SOLUTION: 2sec^2 x-5 sec x+2=0
cos 2x-2 sinx- cos^2 x=-3
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Question 1161776: 2sec^2 x-5 sec x+2=0
cos 2x-2 sinx- cos^2 x=-3
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!
Factor like a quadratic, treating "sec(x)" as the variable.
OR
Take reciprocals to change sec(x) to cos(x).
OR
You can finish from there....
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Substitute for cos(2x); use , since the cosines will cancel, leaving a quadratic in sin(x).
OR
Again you can finish....
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