Trigonometry Examples

$\sin (- \frac{π}{2})$

Step 1

Find the value using the definition of sine.

$\sin (- \frac{π}{2}) = \frac{opposite}{hypotenuse}$

Step 2

Substitute the values into the definition.

$\sin (- \frac{π}{2}) = \frac{- 1}{1}$

Step 3

Divide $- 1$ by $1$ .

$- 1$

Step 4