Question

the value of cos 1140 is

Answer 1

Answer:

COS 1140°

COS 1140° = COS (3 × 360 + 60)

= COS 60°

= 1/2

Answer : 1/2

I hope this helps you.

Answer 2

Step-by-step explanation:

$\bold{cos1140°}$

$\bold{cos( 360° \times 3 + 60°)}$

$\bold{cos60° \: \: ( \because \: cos(360° \times n+ \theta) = cos \theta}$

$\bold{ \frac{1}{2} }$

I hope it is helpful