Find the exact value of cos 180° - sin 180°?

We will use the values of cosπ and sinπ from the trigonometric ratio table to determine the value.

Answer: The value of cos 180° - sin 180° is -1

Let's see the solution.

Explanation:

As we know that the value of cos 180° is -1 and sin 180° is 0.

Therefore, on substituting the values of cos 180º and sin 180º in the equation, we get

⇒ cos 180º - sin 180º =  -1 - 0

= -1

Thus, the value of cos 180° - sin 180° is -1