JEE MATHEMATICS MCQ: TRIGONOMETRY RATIOS

1 Easy

1 of 1

Application +4 | -1

\tan ^2 36^{\circ}+k\left(\sin 18^{\circ}+\cos 36^{\circ}\right)=5

, then the value of

k

View answer and explanation

Correct option: C

The correct answer is C (4) because substituting the known values of

\sin 18^{\circ}

and

\cos 36^{\circ}

into the equation and solving for

k

yields

k=4

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