For questions 6 - 9, prove the following trigonometric identities. 6. Seco = csce (3 points) tane Calculation Reason9. Prove tan sing for e in quadrant 1 by filling in the reasons below. (3 1+ cose points) Calculation Reason\f15. a. Show sin' xcos? x = 1-cos#x by filling in the table below. Start with the 8 left-hand side. (3 points) Calculation Reason b. Find all solutions to the equation sin xcos? x = 2-V2 . (2 points) 1616. Use the half-angle formulas to come up with an exact expression for each function value below. You do not have to simplify your answer. a. tan (2 points) b. cos 00 /4 (2 points) C. tan 16 (2 points)I7. Recall that the equation for the horizontal distance it in feet of a projectile 2 .vith initial velocity v and initial angle a is given by h- :Lshemsa. feet second ensure that the horizontal distance will he exactly.r 100 feet? (3 points) 3. Assume the initial velocity is EEI . What initial angle will you need to b. Assume the initial velocity is 60 What is the maximum horizontal second distance possible and at what angle does this occur? (2 points)