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Answer to Question #34269 in Trigonometry for jeff
Question #34269
prove the following indentities
a) sin(x+y)sin(x-y)=sin^2x-sin^2y
a) sin2x+sin4x+sin6x=4cosxcos2xsin3x
a) sin(x+y)sin(x-y)=sin^2x-sin^2y
a) sin2x+sin4x+sin6x=4cosxcos2xsin3x
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