Solve -3cos(pi/2)*sin(pi/2)

$$-3 \cos ( \frac{ \pi }{ 2 } ) \times \sin ( \frac{ \pi }{ 2 } )$$

Evaluate

$$0$$

Solution Steps

Get the value of \cos(\frac{\pi }{2}) from trigonometric values table.

$$-3\times 0\sin(\frac{\pi }{2})$$

Multiply -3 and 0 to get 0.

$$0\sin(\frac{\pi }{2})$$

Get the value of \sin(\frac{\pi }{2}) from trigonometric values table.

$$0\times 1$$

Multiply 0 and 1 to get 0.

$$0$$

Factor

$$0$$