Question 718028
cot^2x-1; solve in terms of sinx
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cot^2x-1
It's not an equation, so there's nothing to solve.
If you want to write it in terms of sine:
cot^2x-1 = cos^2/sin^2 - 1
= {{{(1 - sin^2(x))/sin^2(x) - 1}}}