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anonymous

  • one year ago

If sin theta=3/5 and theta is in quad 2 the exact form of cos (5pi/3-theta) is .....? I just need help with it I can do the work but a little help could help lol

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  1. 0_0youscareme
    • one year ago
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    https://answers.yahoo.com/question/index?qid=20100719180410AAc49St

  2. anonymous
    • one year ago
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    o.O thats not the same question

  3. anonymous
    • one year ago
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    Yeah I know for sure thats not the right answer lol

  4. anonymous
    • one year ago
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    Use the compound angle formula for cos,

  5. 0_0youscareme
    • one year ago
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    i put the link there bcuz that he just put copy and paste

  6. anonymous
    • one year ago
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    this thing is refusing to let me use the equation tool... cos(A-B)=cosAcosB+sinAsinB

  7. 0_0youscareme
    • one year ago
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    i never said it had the answer

  8. anonymous
    • one year ago
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    Nono lol I was talking about jacob

  9. 0_0youscareme
    • one year ago
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    yeah but i put the link were he copy and pasted the answer some1 else put

  10. anonymous
    • one year ago
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    I got the answer 3sqrt3-4/10 but thats the same answer as another problem I did

  11. anonymous
    • one year ago
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    he deleted it i think... XD

  12. anonymous
    • one year ago
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    \[\sin \Theta=\frac{ 5 }{ 3 }\] \[\cos \theta=\frac{ 4 }{ 5 }\] \[\cos (\frac{ 5\pi }{ 3 }-\theta)=\cos \frac{ 5\pi }{ 3 } \cos \theta + \sin\]

  13. anonymous
    • one year ago
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    oops incomplete... k im not used to this equation tool. meant to be sin5pi/3sin(theta)

  14. anonymous
    • one year ago
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    @zepdrix Do you have any idea of how this is done? I think my work is correct

  15. anonymous
    • one year ago
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    \[=\frac{ 1 }{ 2 }\frac{ 4 }{ 5 }+(-\frac{ \sqrt{3} }{ 4 })\frac{ 3 }{ 5 }\]

  16. anonymous
    • one year ago
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    I think I got it now after doing it

  17. anonymous
    • one year ago
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    But the way you were doing it was a little wrong lol

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