Sine and cosine are each other's cofunctions. In mathematics, a function f is cofunction of a function g if f (A) = g (B) whenever A and B are complementary angles (pairs that sum to one …

The cofunction identities give a relationship between trigonometric functions sine and cosine, tangent and cotangent, and secant and cosecant. These functions are referred to as …

Oct 22, 2025 · A trigonometric cofunction is defined as expressing a trigonometric angle ratio in terms of the other. It illustrates how sine, cosine, tangent, cotangent, secant, and cosecant …

Before we tackle what a cofunction is, you should be comfortable with definition of a function and what complementary angles are.

What are Co-Functions in Trigonometry, Finding the cofunction, Using the cofunction relationship, examples and step by step solutions

What is a cofunction of an angle? The cofunction of an angle is the trigonometric function of the angle's complement that produces an equal value to another trig function of the original angle.

May 17, 2025 · Explore cofunction relationships among sine, cosine, tangent and more. Learn to derive and apply these key trigonometric identities.

In this lesson, we will learn: What cofunction identities are, and where they come from. How we can write and relate one function in terms of its cofunction. How to determine the cofunctions …

Jan 1, 2026 · In a right triangle, you can apply what are called " cofunction identities". These are called cofunction identities because the functions have common values. These identities are …

Trigonometric co-function identities are relationships between the basic trigonometric functions (sine and cosine) based on complementary angles. They also show that the graphs of sine …