Question 978823
csc(theta) = 1/sin(theta)
cot(theta) = cos(theta) / sin(theta)
sec(theta) = 1/cos(theta)
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[ csc (theta)cot(theta)] / sec(theta) =
[ (1/sin(theta)) * (cos(theta)/sin(theta)) / (1/cos(theta) =
( cos(theta) / sin^2(theta) ) * cos(theta) =
cos^2(theta) / sin^2(theta) =
cot^2(theta)