Question no 33

Question no 33 5 Ifec.A=-4- veri 3 — prove that 4 3 sin A — 4 sin 3 A 3tanA — tan-' A 4cos3 A — 3cosA cosec2 0 — cot2 0 sec20— 1 I — 3tan2A 3 — 4 sin 2 A 3 17 If sec A — , verify that 8 4 cos2A — 3 1 3 — tan 2 A — 3 tan2 A