Find the value of
To find: Value of 
Value of cos x repeats after an interval of 2π, hence ignoring 4 × (2π)
= cos 90°
= 0 [∵ cos 90° = 1]
3
Find the value of
To find: Value of
Value of cos x repeats after an interval of 2π, hence ignoring 4 × (2π)
= cos 90°
= 0 [∵ cos 90° = 1]