SOLUTION: verify the indentity sin^2x + cos2x = cos^2x

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Question 511058: verify the indentity
sin^2x + cos2x = cos^2x
Answer by lwsshak3(11628) About Me  (Show Source):
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verify the indentity
sin^2x + cos2x = cos^2x
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start with left side
sin^2x + cos2x
sin^2x+cos^2x-sin^2x
cos^2x
verified: left side=right side