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    Proving trigonometry identities

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    1-sinx/1+sinx=sec^2x-2secxtanx + tan^x

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    => 1- sinx/ 1+sinx
    =>(1/ 1+sinx) - (sinx /1+sinx)
    => (1(1-sinx)/ (1+sinx)(1-sinx) ) -( ...

    Solution Summary

    This solution provides a 9-step solution in proving a trigonometric identity.