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Math Help - solving trig equations

  1. #1
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    solving trig equations

    solve, for 0< a < 360, the equation

    2tan squared a + sec a = 1

    any help would be much appreciated, thanks
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  2. #2
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    Quote Originally Posted by Oranges&Lemons View Post
    solve, for 0< a < 360, the equation

    2tan squared a + sec a = 1

    any help would be much appreciated, thanks
    Substitute \tan^2 a = \sec^2 a - 1 and re-arrange to get a quadratic in sec a ......
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