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3.Trigonometrical Ratios, Functions and Identities
easy
$\cot \left(-\frac{15 \pi}{4}\right)$ के मान ज्ञात कीजिए
A
$1$
B
$1$
C
$1$
D
$1$
Solution
It is known that the values of cot $x$ repeat after an interval of $n$ or $180^{\circ}$
$\therefore \cot \left(-\frac{15 \pi}{4}\right)=\cot \left(-\frac{15 \pi}{4}+4 \pi\right)=\cot \frac{\pi}{4}=1$
Standard 11
Mathematics