If 3 tan A - 5 cos B = and B = 90°, find the value of A.

Question

KnowledgeBoat · Accepted Answer

3 tan A - 5 cos B = ⇒ 3 tan A - 5 cos 90° = ⇒ 3 tan A - 5 x 0 = ⇒ 3 tan A = ⇒ tan A = ⇒ tan A = ⇒ tan A = tan 30° Hence, A = 30°.

Mathematics