This chapter introduces units of angles, types of angles, and the right triangle. It explains trigonometric functions, reciprocal identities, complementary, supplementary, and inverse functions. The chapter explains unit circle and oblique triangles using the laws of sines and cosines.
Keywords
Complementary; Inverse trigonometric function; Law of cosines; Law of sines; Oblique triangles; Reciprocal identities; Right triangle; Supplementary; Trigonometric functions; Unit circle; Units of angles
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