Question

Find the value of $\cos 360°$

Answer 1

Finding the value of $\cos 360°$

We know that, $\cos 0°=1$

Now, once we take a complete rotation in a unit circle, we reach back to the starting point.

After completing one rotation, the value of the angle is $360°$ or $2\mathrm{\pi }$ radians.

Thus, we can say, after reaching the same position,

$\cos 0°=\cos 360°$

Hence the value of $\cos 360°$ is $1$.