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Take the following out of fraction form tan^2x/cscx+1

2 answers

multiply top and bottom by csc-1 to get

tan^2(csc-1) / (csc+1)(csc-1)
= tan^2 * (csc-1)/(csc^2 - 1)
= tan^2 * (csc-1)/cot^2
= tan^4 * (csc-1)
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