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Evaluate :
14 sin 30° + 6 cos 60° - 5 tan 45°.
In each case, given below, find the value of angle A, where 0° ≤ A ≤ 90°.
(i) sin (90° - 3A) . cosec 42° = 1
(ii) cos (90° - A) . sec 77° = 1
Show that :
tan 56° tan 28° tan 34° tan 62° = 1.