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Trigonometric Functions — Maths STD 11 Science — Question

CBSE BoardEnglish MediumSTD 11 ScienceMathsTrigonometric Functions1 Mark
Question
Find the values of the trigonometric function: $\sin \left( { - \frac{{11\pi }}{3}} \right)$
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Answer

$\sin \left( { - \frac{{11\pi }}{3}} \right) = \sin \left( {\frac{{ - 11 \times 180^\circ }}{3}} \right) = \sin ( - 660^\circ )$
$\sin ( - 660^\circ ) = \sin ( - 2 \times 360^\circ + 60^\circ ) = \sin 60^\circ = \frac{{\sqrt 3 }}{2}$

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