Question

(sec square theta -1) (1-cot square theta)

Answer 1

(sec^2 -1) = tan^2

So tan^2 ( 1 - cot^2)

tan^2 - 1

sin^2/cos^2 -1

sin^2 - cos^2)/ cos^2

As cos^2 - sin^2 = cos 2 theta

So -cos 2 theta sec^2 theta

Answer 2

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