6.1 In the diagram, P(—5 ; 12) and T lies on the positive x-axis. PÔT = 0

Answer the following without using a calculator:

6.1.1 Write down the value of tan*0* (1)

6.1.2 Calculate the value of cos*0* (3)

6.1.3 *S(a, b) *is a point in the third quadrant such that TÔS = *0* + 90º and OS = 6,5 units. Calculate the value of *b.* (4)

6.2 Determine, **without using a calculator**, the value of the following trigonometric expression: (5)

6.3 Determine the general solution of the following equation:

6sin^{2} x + 7 cos x -3 = 0 (6)

6.4 Given:

Determine the value of cos 2A **without using a calculator.** (5)

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