.1 In the diagram below, T(x; 15) is a point in the Cartesian plane such that OT = 17 units. P(-2; a) lies on OT. K is a point on the positive x-axis and TOK = 0. Determine, with the aid of the diagram, the following: T(x; 15) P(-2;0) A 0 K 1.1.1 The value of x 1.1.2 tan 0 1.1.3 cos(180° – 0) 1.1.4 The value of a Prove, WITHOUT using a calculator that: (2) (1) (2) (3) (6) sin 315° . tan 210° sin 190° -√2 cos 100° sin 120° 3 Prove the identity: sin - tan 0 · cos² 0 = tan e (4)