9.6

4: The sine of an angle is the length of the side opposite the angle to the length of the hypotenuse.

5: You will need to divide to see which ratio of sides is equal to 0.96.

7: Do sin^-1 on each side of the equation.

14: Start by writing a tangent equation and doing tan^-1 on each side.

26: The output of an inverse trig function is an angle.

27: Start by writing a tangent equation to find KM.

29: Sketch the line and draw a right triangle (of any size) using the x-axis as the bottom.

30: The sin function finds a ratio based on an angle, and the sin^-1 function finds an angle based on a ratio.

31: This would be finding the angle for which the opposite side is 1.2 times as long as the hypotenuse.

34: Multiply each side by 18.