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-   -   To prove lhs = rhs in trignometric equations? (https://www.askmehelpdesk.com/showthread.php?t=597578)

  • Sep 16, 2011, 07:19 PM
    ashin
    To prove lhs = rhs in trignometric equations?
    Sec(a)^2+cot^2(90-a)=2cosec^2(90-a)-1
  • Sep 17, 2011, 08:47 AM
    Unknown008
    Please, do show us what you have tried. Remove all the compound angles to put everything in terms of a. Then, converting everything to sine and cosine is usually much easier.

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