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

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