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Expression is not equivalent to (1 − sin2(x)) tan(-x).

User Qqtf
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Are You trying to find out the equivalent expression? or...
User Bryan Edds
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Answer:

If you are looking for an expression that is no equivalent, then:

(cos^2(x) - 1) cot(-x)

Explanation:

The expression (cos^2(x) - 1) cot(-x) is not equivalent to (1 − sin2(x)) tan(-x).

User Mirko Akov
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