Question

if cot A = 3/4, find cos A​

Answer 1

using trigonometry.

hope you understood

Answer 2

Given,

Cot A = 3/4

wkt,

Cot = adj/opp

By Pythagoras theorem

AC^2 = AB^2 + BC^2

AC^2 = (3)^2 + (4)^2

AC^2 = 9 + 16

AC^2 = 25

AC = 5

NOW,

COS A = adj/hypo

COS A = 3/5