Question

If cos alpha = 1/2 then all possible value of alpha is

Answer 1

Answer:

Cos alpha = 1/2

Cos alpha = cos 60 i.e cos pi/3

As we know that general solution of this is 2npi +- angle

So alpha in radian = 2npi +- pi/3

In degree alpha is 360n +- 60

Here +- is plus or minus and n is any integer.

Hope it helps....!