1.
tan(theta)947 theta = arc tan(947) theta = 1.56974
3.
3 cos(theta)=0.714 3 cos(theta)/3=0.714/3 theta = arc cos(0.238) theta = 1.33049
5.
tan(5(theta))+7 = -0.241 tan(5(theta)) = -7.241 5(theta) = arc tan(-7.241) theta = -1.433562/5 theta = -0.286712
