Trigonometric Identities

Function
Sin
Cos
Tan
Cot

Even-Odd Identities

Reciprocal Identities

Quotient Identities

Pythagorean Identities

The Pythagorean theorem is a statement about triangles containing a right angle. The Pythagorean theorem states that:
“The area of the square built upon the hypotenuse of a right triangle is equal to the sum of the areas of the squares upon the remaining sides.”