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Math Help - [SOLVED] 6sin8xcos8x ?

  1. #1
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    [SOLVED] 6sin8xcos8x ?

    6sin8xcos8x which expression is equivalent?

    sin8x
    sin16x
    3sin4x
    3sin16x


    I thought it was like



    3(2sin8xcos8x)
    3sin^2(2(8x))
    3sin^2(16x) ?
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  2. #2
    Super Member flyingsquirrel's Avatar
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    Hi,
    Quote Originally Posted by brentwoodbc View Post
    3(2sin8xcos8x)
    3sin^2(2(8x))
    The sine is not squared : 2\sin(a)\cos(a)=\sin(2a) so 2\sin(8x)\cos(8x)=\sin(16x)...
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  3. #3
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    Quote Originally Posted by flyingsquirrel View Post
    Hi,

    There is no square : 2\sin(a)\cos(a)=\sin(2a) so 2\sin(8x)\cos(8x)=\sin(16x)...
    your right thank you.
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  4. #4
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    is it 3sin16x or sin16x?
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  5. #5
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    I think its 3 sin 16x
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  6. #6
    Super Member flyingsquirrel's Avatar
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    Quote Originally Posted by brentwoodbc View Post
    I think its 3 sin 16x
    Yes it is.
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