JEE MATHEMATICS MCQ: TRIGONOMETRIC EQUATIONS

1 Easy

1 of 1

Application +4 | -1

\triangle A B C

, if

\angle C=\frac{2 \pi}{3}

, then the value of

\cos ^2 A+\cos ^2 B-\cos A \cos B

View answer and explanation

Correct option: A

\frac{3}{4}

Option A (

\frac{3}{4}

) is correct because by using the given angle and trigonometric identities, the expression simplifies to

\frac{3}{4}

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