calculus
posted by kelly .
Use the even odd properties to find the exact value of the expression. It may be helpful to draw the unit circle graph sin(pi)

The evenodd property for sine states that sin(x) = sin(x).
sin(pi) = sin(pi)
The point on the unit circle at pi (or 180 degrees) is (1, 0). Sine corresponds to the yvalue, so sine at that point is 0.
sin(pi) = 0 = 0