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IloveCharlie

Last problem I need help with! :O It's having to do with finding the identity used in the solution. Please click attached

  • one year ago
  • one year ago

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  1. godorovg
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    hello

    • one year ago
  2. IloveCharlie
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    • one year ago
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  3. IloveCharlie
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    hi :)

    • one year ago
  4. godorovg
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    okay breakdown the problem in your own words

    • one year ago
  5. godorovg
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    okay let's start with tan what do we tan is broken down?

    • one year ago
  6. godorovg
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    we are working backwards to get to the answer here

    • one year ago
  7. IloveCharlie
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    :/ I actually don't really know

    • one year ago
  8. godorovg
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    for example tanA= sinA/cosA= SinA/sinC/TanA/ TanB see that

    • one year ago
  9. godorovg
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    look at the answers given and compare to what the problem there are clues there

    • one year ago
  10. godorovg
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    you still here?

    • one year ago
  11. IloveCharlie
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    Yes, sorry. I'm still here! Umm... Let me check

    • one year ago
  12. IloveCharlie
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    They all have tan though :/

    • one year ago
  13. godorovg
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    yes that is the point because tan is sin/cos

    • one year ago
  14. IloveCharlie
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    Yes but how will I know which one is the answer?

    • one year ago
  15. godorovg
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    and cos^-1 is 1/cos and sin-1 is 1/sin

    • one year ago
  16. godorovg
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    austra I am on the track here? I am rusty so I may be leaving a step out can you help ?

    • one year ago
  17. Australopithecus
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    Fun, look at -arccos(3/5) and arcsin(5/13) as just numbers because that is what they are so set x = arcsin(5/13 and y = -arccos(3/5) and see the identity attached

    • one year ago
  18. Australopithecus
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    note in respect to the image x and y are theta

    • one year ago
  19. Australopithecus
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    well theta1 and theta2 respectively

    • one year ago
  20. IloveCharlie
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    Oh I see. To me, it looks like the first option is the correct choice

    • one year ago
  21. Australopithecus
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    this problem is just about being able to look up trig identities I dont think you will ever have to memorize these unless you go into majoring mathematics even then I doubt you would ever have to

    • one year ago
  22. Australopithecus
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    well there are some trig identites that are important to know but this one I do not believe is used very commonly in early mathematics courses

    • one year ago
  23. Australopithecus
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    also im sure you can derive this instead of memorizing it but idk

    • one year ago
  24. godorovg
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    hey charlie I was trying to backwards with you,because sometimes it is easier that way. I don't want to mess you up so please let me know .

    • one year ago
  25. Australopithecus
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    you are adding in that identity though charlie so it wont be the same

    • one year ago
  26. Australopithecus
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    http://www.sosmath.com/trig/Trig5/trig5/trig5.html

    • one year ago
  27. IloveCharlie
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    @godorovg Oh, it's fine. I just didn't quite understand that way but I appreciate your help. @Australopithecus so... the third oone? I'm trying to match up

    • one year ago
  28. Australopithecus
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    logically I would think so charlie

    • one year ago
  29. godorovg
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    yes it is answer three

    • one year ago
  30. Australopithecus
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    btw unrelated but do you love charlie day from its always sunny in Philadelphia

    • one year ago
  31. IloveCharlie
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    Thank you guys! I really appreciate your help!

    • one year ago
  32. Australopithecus
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    or is that exclusive to all charlies

    • one year ago
  33. IloveCharlie
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    @Australopithecus Oh, no haha Charlie is my dog lol

    • one year ago
  34. godorovg
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    lol funny

    • one year ago
  35. Australopithecus
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    sorry I meant inclusive :)

    • one year ago
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