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-   -   Verify identity? (https://www.askmehelpdesk.com/showthread.php?t=659811)

  • May 12, 2012, 09:18 PM
    crmedina23
    verify identity?
    2cotx/(cotx+tanx)=cos^2x
  • May 13, 2012, 06:46 PM
    ebaines
    Quote:
    Originally Posted by crmedina23 View Post
    2cotx/(cotx+tanx)=cos^2x

    Actually I think the left hand side equals 2 cos^2x.

    Convert the cotx and tanx functions on the left hand side to their sine and cosine eqivalents. Then simplify the resulting fraction by multiplying numerator and denominator by cosx sinx. What do you get?

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