Math question for all those people that are really good at trigonometr

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	Math question for all those people that are really good at trigonometric identities? No, I'm not just being lazy, I've spent around 45 min or so trying to figure out this prob and i'm getting no where help please and showing work is really imp, since that's the whole prob question: Prove the identity cos^2(x) - sin ^2(x) = 1-2sin^2(x) help please! thanks
	By: Guest Date: Thu-Jan-14-2010- Add Response

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0	Answer 1 Convert the sine term, 1-sin^2(x)-sin^2(x)=1-2sin^2(x) (since sin^2(x)+cos^2(x)=1), solve for sin^2(x)) Answer 2 cos²(x) - sin²(x) = 1 - 2sin²(x) (1 - sin²(x)) - sin²(x) = 1 - 2sin²(x) ........ identity: sin²(x) + cos²(x) = 1 1 - 2sin²(x) = 1 - 2sin²(x) 1 = 1 proved Answer: see above
	[d] By: Guest Date: Unknown---

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	. What is 1 + 100

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