SOLUTION: Please help me answer this question:
Prove the following identity:
sec^2x-2secxcosx + cos^2x = tan^2x - sin2^x
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-> SOLUTION: Please help me answer this question:
Prove the following identity:
sec^2x-2secxcosx + cos^2x = tan^2x - sin2^x
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Question 430755: Please help me answer this question:
Prove the following identity:
sec^2x-2secxcosx + cos^2x = tan^2x - sin2^x Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! sec^2x-2secxcosx + cos^2x = tan^2x - sin2^x
Add sin^2
sec^2x-2secxcosx + cos^2x + sin^2(x) = tan^2x
sec^2x-2secxcosx + 1 = tan^2x
sec^2x - 2 + 1 = tan^2x
sec^2 = tan^ + 1
Or 1 = sin^2 + cos^2
