JEE MATHEMATICS MCQ: TRIGONOMETRY RATIOS

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Application +4 | -1

\cos ^2 \frac{A}{2}+\cos ^2 \frac{B}{2}+\cos ^2 \frac{C}{2}=

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Correct option: B

2+2 \sin \frac{A}{2} \sin \frac{B}{2} \sin \frac{C}{2}

Option B (

2+2 \sin \frac{A}{2} \sin \frac{B}{2} \sin \frac{C}{2}

) is correct because by applying half-angle formulas and trigonometric identities, the expression simplifies to the given form.

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