Cofunction Identities Math
Given that the the complement of.
Cofunction identities math. There are six trigonometric ratios of complementary angle identities in trigonometry. A function f is cofunction of a function g if f a g b when a and b are complementary angles. Trigonometric co function identities are relationships between the basic trigonometric functions sine and cosine based on complementary angles. The cofunction identities show the relationship between sine cosine tangent cotangent secant and cosecant.
In this lesson we will look at co function identities. What are the co function identities. Cofunction identities sin x cos frac pi 2 x cos x sin frac pi 2 x sec x csc frac pi 2 x csc x sec. Co function identities can be called as complementary angle identities and also called as trigonometric ratios of complementary angles.
They also show that the graphs of sine and cosine are identical but shifted by a constant of frac pi 2 2π. Recall from geometry that a complement is defined as two angles whose sum is 90.