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Math Help - TRig

  1. #1
    Member srirahulan's Avatar
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    Post TRig

    (sec a + tan a ) = u find out these values in (u) only.


    sec a , tan a , sin a
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  2. #2
    Junior Member ignite's Avatar
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    Re: TRig

    sec(a)+tan(a)=u
    \frac{1}{sec(a)+tan(a)}=\frac{1}{u}
    \frac{sec(a)-tan(a)}{sec^2(a)-tan^2(a)}=\frac{1}{u}
    sec(a)-tan(a)=\frac{1}{u}
    sec(a)=\frac{1}{2}(u+\frac{1}{u})
    Rest you can find out using simple trignometric identities.
    Thanks from srirahulan
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