JEE MATHEMATICS MCQ: MULTIPLE AND SUBMULTIPLE ANGLES

1 Easy

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Analyzing +4 | -1

The value of

{\cos ^3}\left( {\frac{\pi }{8}} \right) \cdot \cos \left( {\frac{{3\pi }}{8}} \right) + {\sin ^3}\left( {\frac{\pi }{8}} \right) \cdot \sin \left( {\frac{{3\pi }}{8}} \right)

View answer and explanation

Correct option: B

\frac{1}{{2\sqrt 2 }}

Option B (

\frac{1}{{2\sqrt 2 }}

) is correct because it is the simplified value of the given trigonometric expression after applying trigonometric identities.

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