# Quick Proof Q

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#1
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)
0
16 years ago
#2
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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#3
Phew, thats sort of what i got.
0
16 years ago
#4
and you say you were offered a place a trinity without applying?
OK.
0
#5
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.
0
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