Question

if sin a = 3/4 find cos A​

Answer 1

if sin a =3/4
then coa a is the reverse of sin a

si cos a will be 4/3


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Answer 2

Your Question is wrong it could be....

because hypotenuse is longest side.....

It must be Tan A

Tan A = P/B = 3/4

P = 3 and B = 4

By Pythagoras Theorem,

$h = \sqrt{ {b}^{2} + {{p}^{2} } }$

Hypotenuse = 5

1. Cos A = B/H

4/5.