Trigonometry : Solved Problems

Trigonometry,
Trigonometric ratios of an acute angle of a right-angled triangle,
Values (with proofs) of the trigonometric ratios of 30°, 45° , 60° and 90°,
Relationships between the ratios ,
Proof and applications of the identity sin2A + cos2A = 1. Only simple identities to be given.
Trigonometric ratios of complementary angles.