Question

Cos⁡〖a-cos^2⁡〖a+1〗 〗/(cos⁡a sin⁡a )

Answer 1

This is of trigonometric functions chapter which tells about positive and negative angles, method of measuring angles in radians as well as in degrees and conversion from one measure to another. The chapter also deals with the definition of Trigonometric Functions with the help of unit circle, general solution of trigonometric equations, signs, domain and range of Trigonometric Functions and their graphs.

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