SOLUTION: Solve {{{ (sec^2)theta = 4 }}} i tried sec^2 theta = tan^2 + 1 so tan^2 theta =3 but i do not know what to do from here on.

Algebra ->  Algebra  -> Trigonometry-basics -> SOLUTION: Solve {{{ (sec^2)theta = 4 }}} i tried sec^2 theta = tan^2 + 1 so tan^2 theta =3 but i do not know what to do from here on.      Log On

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Question 191467: Solve +%28sec%5E2%29theta+=+4+ i tried sec^2 theta = tan^2 + 1 so tan^2 theta =3 but i do not know what to do from here on.
Answer by Alan3354(30993) About Me  (Show Source):
You can put this solution on YOUR website!
Solve +%28sec%5E2%29theta+=+4+ i tried sec^2 theta = tan^2 + 1 so tan^2 theta =3 but i do not know what to do from here on.
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sec%5E2+=+4
sec = +2 ---> cos = 1/2
sec = -2 ---> cos = -1/2
theta = 60 degs, 300 degs
theta = 120 degs, 240 degs