NDA2026MathematicsInverse Trigonometric FunctionsActual
Consider the following in respect of inverse circular functions : I. ⁻¹(-x)=- ⁻¹x II. ⁻¹(-x)= ⁻¹x III. ⁻¹(-x)= - ⁻¹x IV. ⁻¹(-x)= - ⁻¹x How many of the above are correct ?
Options
- AOne
- BTwo
- CThree
- DAll the four
Correct answer
B. Two
Step-by-step solution
Statement I: ⁻¹(-x) = - ⁻¹x is a standard property of inverse trigonometric functions and is correct. Statement II: The correct property is ⁻¹(-x) = - ⁻¹x . Hence, this statement is incorrect. Statement III: The correct property is ⁻¹(-x) = - ⁻¹x . Hence, this statement is incorrect. Statement IV: ⁻¹(-x) = - ⁻¹x is a standard property and is correct. Exactly two of the given statements are correct.