Question

find the value of cos 1140°​

Answer 1

The value is $\cos 1140^\circ=\frac{1}{2}$

Step-by-step explanation:

Given : Expression $\cos 1140^\circ$

To find : The value of the expression ?

Solution :

Re-write the expression as,

$\cos 1140^\circ=\cos (360+780)$

$\cos 1140^\circ=\cos (780)$

$\cos 1140^\circ=\cos (360+420)$

$\cos 1140^\circ=\cos (420)$

$\cos 1140^\circ=\cos (360+60)$

$\cos 1140^\circ=\cos (60)$

$\cos 1140^\circ=\frac{1}{2}$

Therefore, the value is $\cos 1140^\circ=\frac{1}{2}$

#Learn more

Find the value of Cos 1140°

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