This is like the preceding problem except that you need to g

This is like the preceding problem, except that you need to get all answers correctly to get credit. Suppose cos u = 3/5 and sin u is positive. sin(u) = sin(u - pi) = cos(u - pi) = sin(u = pi/2) = cos(u - pi/2) =

Solution

cos u=3/5

sin u=sqrt(1-(3/5)²)=4/5

sin(u-pi)=sin(-(pi-u))=-sin(pi-u)=-sin u=-4/5

cos (u-pi) =cos(-(pi-u) =cos(pi-u) =-cos u=-3/5

sin(u-pi/2)=-cos u=-3/5

cos(u-pi/2)=sin u=4/5