JEE MATHEMATICS MCQ: TRIGONOMETRY RATIOS

1 Easy

1 of 1

Application +4 | -1

{\sin ^2}\,\,5^\circ + {\sin ^2}\,\,10^\circ + {\sin ^2}\,\,15^\circ + ... + {\sin ^2}\,\,90^\circ

is equal to

View answer and explanation

Correct option: C

9\,\,\frac{1}{2}

Option A (2) is correct because if sin x + cosec x = 2, then sin x = 1, and therefore sin^n x + cosec^n x = 1 + 1 = 2.

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C

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