5 cos A=4 sin A, તો tan A=ldots ldots ·s ·s

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8. Introduction to Trigonometry

easy

$5 \cos A=4 \sin A,$ તો $\tan A=\ldots \ldots \cdots \cdots$

A

$\frac{1}{20}$

B

$\frac{1}{4}$

C

$\frac{4}{5}$

D

$\frac{5}{4}$

Solution

$5 \cos A=4 \sin A$

$\therefore \frac{5 \cos A}{\cos A}=\frac{4 \sin A}{\cos A} $

$ \therefore 5=4 \tan A $

$ \therefore \tan A=\frac{5}{4}$

Standard 10

Mathematics

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