JEE MATHEMATICS MCQ: INVERSE TRIGONOMETRY

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Application +4 | -1

\theta = {\cot ^{ - 1}}7 + {\cot ^{ - 1}}8 + {\cot ^{ - 1}}18

, then the value of

\cot \,\theta

must be

View answer and explanation

Correct option: A

Option A (3) is correct because by converting the cotangent inverse to tangent inverse and using the tangent addition formula, we find that

\cot \theta = 3

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