How do you solve 4cos (x-1)=3?

Question

This is a trigonometry identity equation. 

Answer 1

4cos(x-1)=3

cos(x-1)=3/4

cos(x-1)=0.75

use the arccos on a calculator

x-1=41.40962211º

x=1+41.40962211

x=42.40962211º