1. ## solving trig equations

solve, for 0< a < 360, the equation

2tan squared a + sec a = 1

any help would be much appreciated, thanks

2. 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
Substitute $\tan^2 a = \sec^2 a - 1$ and re-arrange to get a quadratic in sec a ......