JEE MATHEMATICS MCQ: TRIGONOMETRY RATIOS

1 Easy

1 of 1

Application +4 | -1

The value of

\cos \,\,\left( {270^\circ + \theta } \right)\,\,\cos \,\,\left( {90^\circ - \theta } \right) - \sin \,\,\left( {270^\circ - \theta } \right)\,\,\cos \,\,\theta

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Correct option: D

\mathrm{1}

Option D is correct because simplifying the trigonometric expression using trigonometric identities results in 1.

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\triangle A B C

C

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

\sin ^2(A / 2)+\sin ^2(B / 2)-\sin ^2(C / 2)=