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anonymous

  • 5 years ago

Please can anyone help me solve cos2x=sinx?

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  1. anonymous
    • 5 years ago
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    Use the double angle expression for the cosine to get cos 2x = sin x cos2(x) - sin2(x) = sin(x) Then replace cos2(x) by 1 - sin2(x) to get (1 - sin2(x)) - sin2(x) = sin(x)

  2. anonymous
    • 5 years ago
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    lol. right i understand that but its not proofing. its getting exact answers .The answers are pie/6 5pie/6 and 3pie/2

  3. anonymous
    • 5 years ago
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    oh

  4. anonymous
    • 5 years ago
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    yeah so pretty much your trying to solve cos2x-sinx=0

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