Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Mathematics (https://www.askmehelpdesk.com/forumdisplay.php?f=199)
-   -   Verifying identities trig (https://www.askmehelpdesk.com/showthread.php?t=734254)

  • Feb 14, 2013, 08:44 PM
    Kpocky
    Verifying identities trig
    csc^2 x-1/csc^2x=cos^2x

    Please explain step by step
  • Feb 15, 2013, 07:38 AM
    ebaines
    First of all the identity you wrote is incorrect, because:


    and this does not equal

    However, I suspect what you meant is this:

    (csc^2(x) - 1)/csc^2x =cos^2x

    It is imperative that you use parentheses properly!

    As usual with these types of problems, start by replacing any functions of tan, cot, sec, and csc with their sin and cos equivalents. In this case you replace csc(x) with 1/sin(x) and the left hand side becomes



    Then simply - multiply through by and apply the identity .

  • All times are GMT -7. The time now is 03:33 AM.