Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Mathematics (https://www.askmehelpdesk.com/forumdisplay.php?f=199)
-   -   Prove the Identity: 2cos^2x-1=(1-tan^2x)/(1 tan^2x) (https://www.askmehelpdesk.com/showthread.php?t=647005)

  • Mar 29, 2012, 06:23 PM
    michtheunicorn
    Prove the Identity: 2cos^2x-1=(1-tan^2x)/(1 tan^2x)
    2cos^2x-1=(1-tan^2x)/(1 + tan^2x)
  • Mar 30, 2012, 05:10 AM
    ebaines
    Convert tanx to sinx/cosx, and remember that sin^2x = 1 - cos^2x. It works out nicely.

    • All times are GMT -7. The time now is 06:40 AM.