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saifoo.khan Group Title

Differentiate: sin(x)*cos(2x)

  • one year ago
  • one year ago

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  1. RolyPoly Group Title
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    \[\frac{d}{dx}sinxcos(2x) = \frac{d}{dx}sinx(1-2sin^2x)\]Does that help?

    • one year ago
  2. saifoo.khan Group Title
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    Umm. Sorry no. I have to use the chain rule. @RolyPoly

    • one year ago
  3. saifoo.khan Group Title
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    @yummydum : That won't work. :P

    • one year ago
  4. yummydum Group Title
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    i realized that :P

    • one year ago
  5. RolyPoly Group Title
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    \[\frac{d}{dx}sinxcos(2x) = cos(2x)\frac{d}{dx}sinx+sinx \frac{d}{dx}cos(2x)\]This?

    • one year ago
  6. saifoo.khan Group Title
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    Pretty late though. @yummydum

    • one year ago
  7. yummydum Group Title
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    uff acha bhai mein chali jaati hoon..khush?

    • one year ago
  8. RolyPoly Group Title
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    You have to use chain rule for the second term lol

    • one year ago
  9. saifoo.khan Group Title
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    Yes! @RolyPoly I got till: \[uv'+vu'\]\[\sin x(-2\sin(2x))+ \cos(2x)(\cos x)\]

    • one year ago
  10. saifoo.khan Group Title
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    @yummydum : RUKO! Sath chalte hain. ;)

    • one year ago
  11. yummydum Group Title
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    kahan leja rahe ho?

    • one year ago
  12. saifoo.khan Group Title
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    In the second term? is my working correct? @RolyPoly

    • one year ago
  13. RolyPoly Group Title
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    Yes, I think so..

    • one year ago
  14. saifoo.khan Group Title
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    Jehan aap farmaish karain. @yummydum

    • one year ago
  15. saifoo.khan Group Title
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    What will the step after that? I'm stuck till there. @RolyPoly

    • one year ago
  16. technofable Group Title
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    yea it's right

    • one year ago
  17. RolyPoly Group Title
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    sin2x = 2sinxcosx cos2x= 2(cosx)^2 -1

    • one year ago
  18. RolyPoly Group Title
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    \[=-2\sin x\sin(2x)+ \cos(2x)(\cos x)\]\[=-2\sin x(2\sin x \cos x)+ (2cos^2x-1)(\cos x)\]

    • one year ago
  19. RolyPoly Group Title
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    For the first term, you'll get -4(sinx)^2 cosx (sinx)^2 = 1-(cosx)^2

    • one year ago
  20. RolyPoly Group Title
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    Then you can express it in terms of cosx, if that's what you want.

    • one year ago
  21. saifoo.khan Group Title
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    Ohhh. Right. Thanks @RolyPoly and @technofable

    • one year ago
  22. saifoo.khan Group Title
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    idk what does that mean.. @yummydum Dubai chaltay hain. =D

    • one year ago
  23. RolyPoly Group Title
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    Welcome..

    • one year ago
  24. yummydum Group Title
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    nahi yaar bus pakistan lejao phir tum free

    • one year ago
  25. saifoo.khan Group Title
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    Haha. Done. Kab chalna hai? @yummydum

    • one year ago
  26. yummydum Group Title
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    bus $2,000 mujhe de do baki sub khair hai, mein khud khayal kar loongi ...free biryani as a compliment ;)

    • one year ago
  27. saifoo.khan Group Title
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    Lmao. $2000 ki tou main zindagi bhar ki biryani kha sakta hoon. :P @yummydum

    • one year ago
  28. yummydum Group Title
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    $2000 main mein pakistan jaa sakti hoon aur shopping bhi poori....us mein se agar bacha tou tumhe biryani khiladoon gi :P

    • one year ago
  29. saifoo.khan Group Title
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    No thank you. Tumhari tokri main hole hoga, but Allah ka shukr mairi tokri main nahi hai.

    • one year ago
  30. yummydum Group Title
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    haha..chalo jao tum dubai chale jao..uri ko saath le jana :P

    • one year ago
  31. saifoo.khan Group Title
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    Lmao. Tum bhi chalo naa.

    • one year ago
  32. yummydum Group Title
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    mein tumhari kya lagti? :P

    • one year ago
  33. saifoo.khan Group Title
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    Uri mairi kia lagti?

    • one year ago
  34. yummydum Group Title
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    mein kya jaanoon? :P i dont go into private files

    • one year ago
  35. saifoo.khan Group Title
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    Hahaha. Aisa kabhi ho sakta hai k koi larki kabhi private files main na jaye?!

    • one year ago
  36. yummydum Group Title
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    LMAOO

    • one year ago
  37. yummydum Group Title
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    i respect private/personal space

    • one year ago
  38. saifoo.khan Group Title
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    Oh please. No girl is like that. I can list million of examples.

    • one year ago
  39. saifoo.khan Group Title
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    And since you belong to the same race, you can't be one. =D

    • one year ago
  40. yummydum Group Title
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    exactly why i tell you im different...sunnay ko taiyaar nahi ho, i know, but still its true :P

    • one year ago
  41. yummydum Group Title
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    to be a girl is not a race..its a species :P

    • one year ago
  42. saifoo.khan Group Title
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    OMG! EVERY OTHER girl EVERY OTHER says that she's not like "other girls" . Lol And you're saying the same thing!

    • one year ago
  43. yummydum Group Title
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    im not "like other girls"...im just not like girls at all :P

    • one year ago
  44. saifoo.khan Group Title
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    Wait! You're not like girls? Then? Are you like boys? lmao.

    • one year ago
  45. yummydum Group Title
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    tom boy

    • one year ago
  46. yummydum Group Title
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    acha ji mujhay kaam kerna hai, kisi aur ko dhoondo yeh sab bak bak kernay k liye :P

    • one year ago
  47. saifoo.khan Group Title
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    Haan haan. "larkon walay" kaam karnay hongay. :P Jao bhai. Kaam karo.

    • one year ago
  48. yummydum Group Title
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    if school work is "larkon walay kaam" then yes :P

    • one year ago
  49. saifoo.khan Group Title
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    Bhahiyon ki tarhan speed main kaam kia hai bhai apnay. Hats off.

    • one year ago
  50. yummydum Group Title
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    LOL

    • one year ago
  51. saifoo.khan Group Title
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    Haan waisay bhi larkiyan konsa parti hain.. Unhain ultay seedhay kaamon say fursay milaygi tou parhnay ka sochainge. :P

    • one year ago
  52. yummydum Group Title
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    uff itni nafrat lol :P

    • one year ago
  53. saifoo.khan Group Title
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    Lol. Not nafrat. Facts. Mairi konsa larkiyon say koi dushmani hai? ;D

    • one year ago
  54. yummydum Group Title
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    abhi nahi hai..jab shaadi ho jaegi tou phir poochna khud say k ab kuch nafrat hai ya nahi ;P

    • one year ago
  55. saifoo.khan Group Title
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    Nahi nahi, InshAllah aisa kuch nahi hoga. "She and I will live happily ever after <3". Lagta hai tumhain bara experience hai. 2-3 shadiyan kar chuki ho kia?

    • one year ago
  56. yummydum Group Title
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    LOLOLOLOLOL

    • one year ago
  57. yummydum Group Title
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    good to hear tum mein insaaniat hai :P

    • one year ago
  58. saifoo.khan Group Title
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    Alhamdulliah, achi wali hai. Tumhara husband jald suicide kar laiga. Tension na lo. :p

    • one year ago
  59. yummydum Group Title
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    Kaminay!

    • one year ago
  60. saifoo.khan Group Title
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    Haha. Aisa usko baar baar bologi tou aur jaldi kar laiga. ;D

    • one year ago
  61. yummydum Group Title
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    dont worry tumhari wali mere wale se pehli khudkushi kerlaigi :P

    • one year ago
  62. yummydum Group Title
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    ye shaadi hui nahi k time for funeral :P

    • one year ago
  63. saifoo.khan Group Title
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    Nah. Mairay sath itni khushi hogi k usko suicide ki zaroorat he nahi paregi.

    • one year ago
  64. yummydum Group Title
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    uff

    • one year ago
  65. saifoo.khan Group Title
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    Wait! Are you even going to get married? I doubt it.

    • one year ago
  66. saifoo.khan Group Title
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    MashAllah MashAllah. ;D

    • one year ago
  67. yummydum Group Title
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    abhi nahi for sure :P ...ill wait till im in my 20's...kaafi time para hai :D

    • one year ago
  68. yummydum Group Title
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    tumhara to lag raha hai kal shaadi hai :P

    • one year ago
  69. saifoo.khan Group Title
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    5~ saal tou hain. Tayyari start kardo! I wish. Ho jaye tou bohat he acha hai. ;D

    • one year ago
  70. yummydum Group Title
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    why so ready to get married? :P

    • one year ago
  71. yummydum Group Title
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    aur ji nahi abhi kuch 6-7 saat hein mere paas :)

    • one year ago
  72. saifoo.khan Group Title
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    Why shouldn't i be? aagay ka time kisne daikha hai? Hum rahain na rahain. ;D If you know what i mean.. Haha, haan haan.. pooray 20 saal he karlo. :p

    • one year ago
  73. yummydum Group Title
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    no i dont know what you mean...?

    • one year ago
  74. saifoo.khan Group Title
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    Like kia pta after 5-6 years you are alive or not. Phehlay karo, baad main karo karni tou hai he na. Tou for safety precautions, phehlay he karlo. Time bachao. :D

    • one year ago
  75. yummydum Group Title
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    LOL ...sahi

    • one year ago
  76. saifoo.khan Group Title
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    Ikr. Sahi like always. Ab nazar na lagao.

    • one year ago
  77. yummydum Group Title
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    nazar bhoolo ab thappar pare ga :P

    • one year ago
  78. saifoo.khan Group Title
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    I would love to get a thappar. ;D

    • one year ago
  79. saifoo.khan Group Title
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    Or thappars..

    • one year ago
  80. yummydum Group Title
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    kyun?

    • one year ago
  81. saifoo.khan Group Title
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    Why not? Thappar he tou hai.

    • one year ago
  82. saifoo.khan Group Title
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    But wait! Don't even dare to touch me. Mujhay koi deadly disease nahi lagwani.

    • one year ago
  83. yummydum Group Title
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    zor ka parta hai, soch lo? ...khair get used to it..jo aegi wo khud bohot mare gi :P

    • one year ago
  84. yummydum Group Title
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    mujhay koi zarurat nahi hai tumse disease lene ki so dont worry...tumhari jo aegi (agar aegi :P) wo khud mera kaam poora kerday gi

    • one year ago
  85. saifoo.khan Group Title
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    Haan haan. No worries. Bohat zoor zoor walay khaye hain.. Aur tumhara tou simple hai.. Haha. Disease mujhay lagay gi TUM say. InshAllah ayegi. And aisa koi kaam pura nahi karnay wali wo.

    • one year ago
  86. yummydum Group Title
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    uff..chalo ro nahi :P ...i have to go..tum jao usse dhoodo ;P

    • one year ago
  87. saifoo.khan Group Title
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    Haha. I'm going too. Nite. :')

    • one year ago
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