Question 1082640
(tan^2)x = {{{(-3/2)}}} secx
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{{{tan^2(x) = -3sec(x)/2)}}}
Multiply thru by cos(x)
tan*sin = -3/2
sin^2/cos = -3/2
sin^2 = -3cos/2
1-cos^2 = -3cos/2
2 - 2cos^2 = -3cos
2cos^2 - 3cos - 2 = 0
(2cos + 1)*(cos - 2) = 0
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cos = 2 --> no real number solution
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2cos + 1 = 0
cos = -1/2
etc