SOLUTION: Prove: cos^2 z+1=2cos^2 z+sin^2

SOLUTION: Prove: cos^2 z+1=2cos^2 z+sin^2

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Question 446689: Prove: cos^2 z+1=2cos^2 z+sin^2
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Prove: cos^2 + 1=2cos^2 + sin^2
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Subtract cos^2
1 = cos^2 + sin^2
QED

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