8. Introduction to Trigonometry
easy

$\operatorname{cosec} A=\sqrt{10},$ તો $\sin A=\ldots \ldots \ldots . . .$

A

$3$

B

$\frac{1}{\sqrt{10}}$

C

$\frac{1}{{3}}$

D

$\frac{3}{\sqrt{10}}$

Solution

$\operatorname{cosec} A=\sqrt{10} $

$ \therefore \frac{1}{\sin A}=\sqrt{10} $

$ \therefore \sin A=\frac{1}{\sqrt{10}}$

Standard 10
Mathematics

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