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What is (\sin^{-1}(-x)) equal to?

Answer and explanation

Correct answer: (-\sin^{-1}x)

The governing concept is the odd-function property of the principal branch of inverse sine. For every x in the domain [-1, 1], arcsin(-x) = -arcsin(x). This follows because sine is odd and the principal range of arcsin is [-π/2, π/2], which is symmetric about zero. Thus changing the input from x to −x changes the output sign only, so option A is correct. Option B incorrectly treats arcsin as an even function. Option C is a relation associated with arccos, not arcsin, while option D is not the correct negative-input identity. The domain restriction is essential because real arcsin values exist only when the input lies between −1 and 1.

Related tags

Inverse-TrigonometryOdd-FunctionArcsinGraphs Of Inverse Trigonometric FunctionsInverse Trigonometric FunctionsMathematicsClass 12 Mcq

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