SOLUTION: prove {{{sin^2(theta)=(1/2)(1-cos2(theta))}}} is an identity

Question 882956: prove is an identity
Answer by Leaf W.(135) (Show Source): You can put this solution on YOUR website!
Hello!
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Since the right side is more complicated, let us work from the right and try to get to the left side.
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Use the trig identity and simplify:

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Since , , so use this to substitute for and simplify:

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Yay! Both sides of the equation are the same, so you have verified the identity!
Let me know if you need any further clarification. =)
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