JEE MATHEMATICS MCQ: TRIGONOMETRY RATIOS

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Application +4 | -1

\sin 2 \theta+\sin 2 \phi=1 / 2

and

\cos 2 \theta+\cos 2 \phi=3 / 2

, then

\cos ^2(\theta-\phi)=

View answer and explanation

Correct option: B

5 / 8

Option B (5 / 8) is correct because squaring and adding the given equations, then using trigonometric identities, leads to

\cos^2(\theta - \phi) = 5/8

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