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What is the value of \(\cosec^2 x-\cot^2 x\)?

Answer and explanation

Correct answer: \(1\)

The governing identity is cosec²x = 1 + cot²x. It follows from sin²x + cos²x = 1 by dividing every term by sin²x, wherever the expressions are defined. Subtracting cot²x from both sides gives cosec²x − cot²x = 1. Therefore option B is correct. Options A and D may simplify to 1 when their denominators are nonzero, but they are unrelated forms rather than the identity being directly applied, and they can be undefined for particular x-values. Option C is incorrect because cosec²x and cot²x are not generally equal; their difference is exactly the constant 1. The identity is valid on the common domain of the original expressions.

Related tags

Trigonometric-IdentitiesCosecantCotangentTrigonometric Functions And Their PropertiesTrigonometric FunctionsMathematicsClass 12 Mcq

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