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anonymous

  • one year ago

Which of the following are solutions to the equation sinx cosx =-1/4? Check all that apply. A.7pi/12+npi B.11pi/12+npi C.7pi/12+npi/2 D.7pi/6+npi

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  1. arindameducationusc
    • one year ago
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    what is n?

  2. anonymous
    • one year ago
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    I'm not sure, just part of the problem

  3. arindameducationusc
    • one year ago
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    Ok got it... wait.

  4. freckles
    • one year ago
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    use sin(2x)=2sin(x)cos(x) this is the double angle identity divide 2 on both sides you have 1/2*sin(2x)=sin(x)cos(x) replace sin(x)cos(x) with 1/2*sin(2x)

  5. arindameducationusc
    • one year ago
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    I agree with @freckles You will get x=pi/12 Then you can solve for n. Did you get it? Or you need more help

  6. anonymous
    • one year ago
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    I got it. The answer was A and B

  7. arindameducationusc
    • one year ago
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    Congrats @melisa1m

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