A function f is cofunction of a function g if f(A) = g(B) when A and B are complementary angles. sin A = cos(90° - A) cos A = sin(90° - A) sin A = cos B, if A + B = 90° sec A = csc(90° - A) csc A = sec(90° - A) ...
Trigonometric functions that are equal when their arguments are complementary angles, such as sine and cosine, tangent and cotangent, and secant and cosecant. McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc. ...
Related Lessons Related Courses Trigonometric Functions of Real Numbers: Definition & Examples Trigonometric Functions & Values | Overview & Examples Circular Functions | Sine, Cosine & Tangent Sine & Cosine of Complementary Angles | Formulas & Applications Start...