Question 1034228
18secx^2- 17secxtanx - 12 = 0
Multiply thru by cos^2
18 - 17sin(x) - 12cos^2(x) = 0
12cos^2 + 17sin - 18 = 0
cos^2 = 1 - sin^2
12sin^2 - 17sin + 6 = 0
*[invoke solve_quadratic_equation 12,-17,6]
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sin(x) = 3/4, 2/3