solving trig equations

solve, for 0< a < 360, the equation

2tan squared a + sec a = 1

any help would be much appreciated, thanks :)

Quote:

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Originally Posted by Oranges&Lemons

solve, for 0< a < 360, the equation

2tan squared a + sec a = 1

any help would be much appreciated, thanks :)

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Substitute and re-arrange to get a quadratic in sec a ......