JEE MATHEMATICS MCQ: TRIGONOMETRY RATIOS

1 Easy

1 of 1

Application +4 | -1

\frac{\cos 10^{\circ}+\sin 10^{\circ}}{\cos 10^{\circ}-\sin 10^{\circ}}

is equal to

View answer and explanation

Correct option: A

\tan 55^{\circ}

Option A (

\tan 55^{\circ}

) is correct because the expression simplifies to

\tan(45^{\circ} + 10^{\circ})

using the tangent addition formula.

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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)=