Question

Is the value of sine positive, negative, or zero at 3π/2?

Answer 1

Answer:

Negative.

Step-by-step explanation:

The given function is

$sin(\frac{3 \pi}{2} )$

Where $\pi = 180 \°$, so the angle is $\frac{3(180)}{2}=270$

This angle is at between the third and fourth quadrant, the angle has its endside at y-axis, specifically, at its negative side, where the sin function is -1, because it's in the negative part of y-axis.

Therefore, the right answer is negative.