7. 10. Find exact value of the composition of trigonometric function and inverse trigonometric function. Use right triangle and show all work. tan(arccos(i)) x 1 Verify trigonometric identity secz (x) - cot(x) cot(x) = tan(x) Use the Law of Sines and Law of Cosines to solve the triangle. Sketch the triangle and place all given values on it. C =108,a=10,b=7 Given polynomial f (x) = 3x3 2.7c2 + 7x 2 . a) List all possible rational zeros of the given mction b) Use Descartes' Rule of Signs to determine the possible number of positive and negative real zeros. State clearly how you computed the number of the changes of the sings and what you use to determine the possible number of negative zeros. c) Find one rational zero and use long division or synthetic division to nd all other real roots. Show all work. d) Find x- and y-intercepts. 2) Find end behavior. Explain how you do it