Publisher's Synopsis
Excerpt from Solutions of the Examples in Hall and Knight's Elementary Trigonometry
Sin2 0 cot2 0 sin2 0: sin2 0 (1 cotz 0) sin2 0 cosec2 a: 1. (1 tan2 0) (1 sin2 0) sec2 0 cos2 0: 1. Cosec2 9 tan2 0 1 12 81112 0 1 sec2 0 1 tan2 0. Sm 6' cos2 0 First side cos2 A sin2 A 1. First Side sec2 A tan2 Al: 1. First Side: Sin A Sin A cos A cos A sin2 A cos2 A 1. First side: sec A sec A tan A tan A see2 A tan2 A 1. Sin a. Cos4 a (sin2 a cos2 a) (sin2 a cos2 d) sin2 a cos2 a sin2 a (1 sin d) 2 sin2 a 1. Sin2 a cos2a=1 cos2 a cos2a=1 2 cos a. First Side (sec2 (1 1) (sec2 at. Tan2 a. (2 tan2 a).
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