Respuesta :

Answer:

cot x

Step-by-step explanation:

ashishdwivedilVT

The value of given expression is cot²x.

What is Trigonometry?

In trigonometry, there are six trigonometric ratios, namely, sine, cosine, tangent, secant, cosecant, and cotangent.

Here, given expression;

(csc x - 1)(csc x + 1) = csc²x - 1

                              = cot²x

Thus, the value of given expression is cot²x.

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