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3.Trigonometrical Ratios, Functions and Identities
easy
$\sin \left(-\frac{11 \pi}{3}\right)$ के मान ज्ञात कीजिए
A
$\frac{\sqrt{3}}{2}$
B
$\frac{\sqrt{3}}{2}$
C
$\frac{\sqrt{3}}{2}$
D
$\frac{\sqrt{3}}{2}$
Solution
It is known that the values of $\sin x$ repeat after an interval of $2 n$ or $360^{\circ} .$
$\therefore \sin \left(-\frac{11 \pi}{3}\right)=\sin \left(-\frac{11 \pi}{3}+2 \times 2 \pi\right)=\sin \left(\frac{\pi}{3}\right)=\frac{\sqrt{3}}{2}$
Standard 11
Mathematics