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Quick Proof Q watch

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    I've done a simple proof thing, but i was tired so i would like to compare it with your answer

    Its Prove: Sin(2X) = 2Sin(X)Cos(X)

    sin (A+B) = sin Acos B + sin Bcos A
    sin (A+A) = sin Acos A + sin Acos A = 2sin Acos A
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    Phew, thats sort of what i got.

    and you say you were offered a place a trinity without applying?
    OK.
    • Thread Starter
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    Haha, yeah i know. Im not the sort of person who seems intelligent to be honest.
    But when im on form i am.
    At least i hope i am anyway.
 
 
 
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