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Math Help - trigonometry

  1. #1
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    trigonometry

    Can some one help me with this :

    sin^4a+cos^4a+2sin^2acos^2a=1
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  2. #2
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    Re: trigonometry

    Quote Originally Posted by zotikamaliqi View Post
    Can some one help me with this :

    \sin^4(a)+\cos^4(a)+2\sin^2(a)\cos^2(a)=1

    \sin^4(a)+\cos^4(a)+2\sin^2(a)\cos^2(a)=(\sin^2(a)  +\cos^2(a))^2
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