JEE MATHEMATICS MCQ: TRIGONOMETRY RATIOS

1 Easy

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Application +4 | -1

\mathrm{A,}\,\mathrm{B,}\,\mathrm{C,}\,\mathrm{D}

are the angles of a cyclic quadrilateral, then

\cos \,\,A + \cos \,\,B + \cos \,\,D\;

is equal to

View answer and explanation

Correct option: D

\mathrm{0}

Option D (0) is correct because in a cyclic quadrilateral, opposite angles are supplementary, leading to

\cos A + \cos C = 0

and

\cos B + \cos D = 0

, thus the sum is 0.

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