what is the value ofcos pie value
cos(pi) = -1You should have this memorized along with other values such assin(0) = 0cos(0) = 1sin(pi/2) = 1cos(pi/2) = 0sin(pi) = 0cos(pi) = -1sin(3pi/2) = -1cos(3pi/2) = 0and remember that tan = sin/cos
