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Answer to Question #9699 in Trigonometry for Laurel Mallea

Question #9699
solve each equation on the interval [0,2π)
12. sin 3x = -1/2
13. sin 2x + cos x = 0
14. 2 sin^2 x + cos x = 1
15. 2 cos^2 x - 3 cos x +1 = 0
16. cos x = -0.092
17. tan x sec x = 3 tan x
18. tan^2 x - 3 tan x - 2 = 0
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