Raymond B. answered 05/12/21
Tutor
5
(2)
Math, microeconomics or criminal justice
sin(7pi/4) = -1/sqr2 = -cos(7pi/4)
sin(7pi/4) = -(1/2)sqr2
cos(7pi/4) = 1/sqr2
cos(7pi/4) = (1/2)sqr2
7pi/4 = 360-45 = 315 degrees
sin(7pi/4) = about -0.707
cos(7pi/4) = about +0.707