SOLUTION: Verify the identify cos^2x-sin^2x=2cos^2x-1 Thank you in advance

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Question 1005320: Verify the identify
cos^2x-sin^2x=2cos^2x-1
Thank you in advance
Found 2 solutions by ikleyn, MathTherapy:
Answer by ikleyn(52835)   (Show Source): You can put this solution on YOUR website!
.
Verify the identify
cos^2x - sin^2x = 2cos^2x - 1
--------------------------------------

Add to both sides.


Answer by MathTherapy(10555)   (Show Source): You can put this solution on YOUR website!

Verify the identify
cos^2x-sin^2x=2cos^2x-1
Thank you in advance


Left side: 

 -------- Substituting  for 

 (VERIFIED) 

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