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JEE MATHEMATICS MCQ: TRIGONOMETRY RATIOS

1 Easy

1 of 1

Application +4 | -1

In a

\Delta \,\;ABC,\;\,\angle \;A = \frac{\pi }{2}

, then

{\cos ^2}\,\,B + {\cos ^2}\,\,C

equals

View answer and explanation

Correct option: C

\mathrm{1}

Option C (1) is correct because in a right-angled triangle,

B + C = \frac{\pi}{2}

, and thus

{\cos ^2}\,B + {\cos ^2}\,C = {\cos ^2}\,B + {\sin ^2}\,B = 1

.

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