# Sec and cos relationship definition

### Sec, Cosec and Cot – Mathematics A-Level Revision

Relationships between the Functions csc q = 1/sin q, sec q = 1/cos q, cot q = 1/tan q sin2 q + cos2 q = 1, 1 + tan2 q = sec2 q, 1 + cot2 q = csc2 q is true for all values of the variable for which each side is defined is called an identity. defining relations for tan, cot, sec, cos, in terms of sin and, Defining relations for tangent, cotangent, secant, and cosecant in terms of sine and cosine. In mathematics, the trigonometric functions are functions of an angle. They relate the angles of Especially with the last four, these relations are often taken as the definitions of those functions, but one can .. The cotangent (tangent complement, Latin: cotangens, tangens complementi) of an angle is the reciprocal of its.

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