Question

if tanaA =3/4 , find the value of cosA​

Answer 1

Answer:

If tan A = 3/4 = P/B

let perpendicular be 3x units.

and base be 4x units.

By Pythagoras Theorem,

H²=p2+B2

H²=(4x)²+(3x)²

H²=(16x)²+(9x)²

H²=25x²

H=√25x²

H=5x

Atq,

1. Value of Sin A

Sin A = P/H

=3x/5x

=3/5

2. Value of Cos A

Cos A = B/H

= 4x/5x

=4/5

Step-by-step explanation:

$Hope \: it \: helps...!!$