The value of $\cot \,\,36^\circ \,\,\cot \,\,72^\circ $ is

JEE MATHEMATICS MCQ: MULTIPLE AND SUBMULTIPLE ANGLES

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The value of

\cot \,\,36^\circ \,\,\cot \,\,72^\circ

View answer and explanation

Correct option: B

\frac{1}{{\sqrt 5 }}

Option B (

\frac{1}{{\sqrt 5 }}

) is correct because by using trigonometric identities and known values of trigonometric functions for specific angles, the expression simplifies to

\frac{1}{{\sqrt 5 }}

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