Q4. Deliffe off function Having set D/ as Its domnialll alld set A as Its Tallgc. DKCICII UIC TUIICUTOHIS TO clearly display the range and domain of your functions. (a) D = [0. 1) and R = [- 1, 4) (b) D = (- co, 1) U(1, 2) and R = (1, 09) Q5. Graph the function f (x) = V/x - 1 - 1. Q6. Proof tan tan (x + n) = tantanx. Q7 Assume 0 is in the third quadrant and cos cos 0 =- 5 ' find (a) sin sin 2 . (b) cos cos 20