Question 435641
secx/cotx+tanx=sinx
Multiply thru by cot
sec + 1 = sin*cot = sin*(cos/sin) = cos
Multiply by cos
1 + cos = cos^2
cos^2 - cos - 1 = 0
Sub x for cos
x^2 - x - 1 = 0
*[invoke solve_quadratic_equation 1,-1,-1]
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cos(x) = -0.618...
x =~ 128 degs