8. Introduction to Trigonometry
medium

$\cot \theta=\frac{a}{b},$ તો $\frac{\cos \theta-\sin \theta}{\cos \theta+\sin \theta}=\ldots \ldots \ldots$

A

$\frac{a}{b}$

B

$\frac{b}{a}$

C

$\frac{a+b}{a-b}$

D

$\frac{a-b}{a+b}$

Solution

$\cot \theta=\frac{a}{b} \, \therefore \frac{\cos \theta}{\sin \theta}=\frac{a}{b} \, \therefore \frac{\cos \theta-\sin \theta}{\cos \theta+\sin \theta}=\frac{a-b}{a+b}$

Standard 10
Mathematics

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