Question

find the value of= cos^-1 cos(1540)​

Answer 1

Answer:

100

Step-by-step explanation:

Given  

find the value of = cos^-1 cos(1540)

We know that cos^-1 (cos a) = a

So we have

Cos^-1 (cos 1540) = cos^-1 [cos(1440 + 100)]

Now cos (360 x n + theta) = cos theta

So cos(360 x 4 + 100) = cos 100

So cos^-1(cos 100) = 100 degree