Prove that [sin x + cos x]^2 = 1 + sin 2x
Last edited by Manizzle; Nov 26th 2008 at 07:21 PM.
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Originally Posted by Manizzle Prove that [sin x + cos x] = 1 + sin 2x I think you mean ...
If that's not what he means then his book must be wrong.
yes i'm sorry thats what i meant, my superscript didn't work with the font i had on here sorry guys
square the left side ...
rearrange a bit ...
now, you should know what the sum of the first two terms is ... also, look up the double angle formula for sine to deal with the last term.
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