5.1 De-Moivre’s theorem 5.2 Extraction of roots of a complex quantity 5.3 Expansions of sin nq, cos nq and tan nq 6. 6.1 Circular Functions 6.2 Hyperbolic Functions 6.3 Inverse Circular Functions 6.4 Inverse Hyperbolic Functions 1. Application of Trigonometry to solve the problems related to Industries and real world.