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Math Help - write the expression as the sine, cosine , or tangent of an angle

  1. #1
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    write the expression as the sine, cosine , or tangent of an angle

    2 sin100 cos 100
    any suggestion? thanks in advance
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  2. #2
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    Quote Originally Posted by alessandromangione View Post
    2 sin100 cos 100
    any suggestion? thanks in advance
    Dear alessandromangione,

    2sin\theta\cos\theta=sin2\theta

    Therefore,
    2sin100^{o}cos100^{o}=sin(2\times100^{o})=sin200\a  pprox-0.3420

    Hope this will help you.

    By the way what a big name you have! Can you tell us the meaning of it??
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