Trigonometry Examples

$3 \cos (\frac{3 π}{2})$

Step 1

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant.

$3 \cos (\frac{π}{2})$

Step 2

The exact value of $\cos (\frac{π}{2})$ is $0$ .

$3 \cdot 0$

Step 3

Multiply $3$ by $0$ .

$0$