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saifoo.khan Group Title

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

  • 2 years ago
  • 2 years 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?

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

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

    • 2 years ago
  4. yummydum Group Title
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    i realized that :P

    • 2 years 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?

    • 2 years ago
  6. saifoo.khan Group Title
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    Pretty late though. @yummydum

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

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

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

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

    • 2 years ago
  11. yummydum Group Title
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    kahan leja rahe ho?

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

    • 2 years ago
  13. RolyPoly Group Title
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    Yes, I think so..

    • 2 years ago
  14. saifoo.khan Group Title
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    Jehan aap farmaish karain. @yummydum

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

    • 2 years ago
  16. technofable Group Title
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    yea it's right

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

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

    • 2 years 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

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

    • 2 years ago
  21. saifoo.khan Group Title
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    Ohhh. Right. Thanks @RolyPoly and @technofable

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

    • 2 years ago
  23. RolyPoly Group Title
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    Welcome..

    • 2 years ago
  24. yummydum Group Title
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    nahi yaar bus pakistan lejao phir tum free

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

    • 2 years 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 ;)

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

    • 2 years 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

    • 2 years 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.

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

    • 2 years ago
  31. saifoo.khan Group Title
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    Lmao. Tum bhi chalo naa.

    • 2 years ago
  32. yummydum Group Title
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    mein tumhari kya lagti? :P

    • 2 years ago
  33. saifoo.khan Group Title
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    Uri mairi kia lagti?

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

    • 2 years 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?!

    • 2 years ago
  36. yummydum Group Title
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    LMAOO

    • 2 years ago
  37. yummydum Group Title
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    i respect private/personal space

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

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

    • 2 years 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

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

    • 2 years 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!

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

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

    • 2 years ago
  45. yummydum Group Title
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    tom boy

    • 2 years 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

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

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

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

    • 2 years ago
  50. yummydum Group Title
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    LOL

    • 2 years 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

    • 2 years ago
  52. yummydum Group Title
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    uff itni nafrat lol :P

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

    • 2 years 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

    • 2 years 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?

    • 2 years ago
  56. yummydum Group Title
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    LOLOLOLOLOL

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

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

    • 2 years ago
  59. yummydum Group Title
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    Kaminay!

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

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

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

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

    • 2 years ago
  64. yummydum Group Title
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    uff

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

    • 2 years ago
  66. saifoo.khan Group Title
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    MashAllah MashAllah. ;D

    • 2 years 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

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

    • 2 years 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

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

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

    • 2 years 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

    • 2 years ago
  73. yummydum Group Title
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    no i dont know what you mean...?

    • 2 years 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

    • 2 years ago
  75. yummydum Group Title
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    LOL ...sahi

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

    • 2 years ago
  77. yummydum Group Title
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    nazar bhoolo ab thappar pare ga :P

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

    • 2 years ago
  79. saifoo.khan Group Title
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    Or thappars..

    • 2 years ago
  80. yummydum Group Title
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    kyun?

    • 2 years ago
  81. saifoo.khan Group Title
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    Why not? Thappar he tou hai.

    • 2 years 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.

    • 2 years 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

    • 2 years 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

    • 2 years 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.

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

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

    • 2 years ago
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