What is the correct formula for d/dx [cot⁻¹ x]?
d/dx [cot⁻¹ x] का सही formula क्या है?
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Correct Answer
A. -1 / (1+x²)
ExplanationStep 1: Identify the concept: inverse trigonometric derivative. Step 2: By the standard inverse trigonometric derivative, the answer is -1/(1+x²). Step 3: Exam tip: Watch the sign carefully in inverse trigonometric derivatives.
Step 1: अवधारणा inverse trigonometric derivative है। Step 2: Standard inverse trigonometric derivative के अनुसार answer -1/(1+x²) है। Step 3: याद रखें: Inverse trig derivatives में sign ध्यान से देखें।