Library Articles

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."

Co-function Identities

Sum-Difference Formulas

Double Angle Identities

Power-Reducing/Half angle formulas

Sum-to-Product Formulas

Product-to-Sum

Derivatives of Trigonometric Functions


Laws of Sines and Cosines
The law of Sines :



The law of Cosines :