please write every answer with question number

Question 4 Evaluate the following expressions. Your answer must be an exact angle in radians and in the interval [0, 7] . Example: Enter pi/6 for 6 ' (a) cos 2 (b) cos ( - 1) = (c) cos (0) =Question 5 Evaluate the following expressions. Your answer must be an exact angle in radians and in the interval 2' 2] Example: Enter pi/6 for 6 (a) tan (V3) = 3 (b) tan -1 3 (c) tan ( - 3) =Question 6 Evaluate the following expression. Your answer must be in exact form: for example, type pi/6 for or DNE if the expression is undefined. sin(arcsin(0.1)) =