In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for...

Pythagorean trigonometric identity, also called simply the Pythagorean identity, is an identity expressing the Pythagorean theorem in terms of trigonometric functions...

Inverse trigonometric functions Logarithmic identities Summation identities Vector calculus identities List of inequalities List of set identities and relations –...

are several equivalent ways for defining trigonometric functions, and the proofs of the trigonometric identities between them depend on the chosen definition...

section contains the most basic ones; for more identities, see List of trigonometric identities. These identities may be proved geometrically from the unit-circle...

earliest-known tables of values for trigonometric ratios (also called trigonometric functions) such as sine. Throughout history, trigonometry has been applied...

In trigonometry, it is common to use mnemonics to help remember trigonometric identities and the relationships between the various trigonometric functions...

function is replaced with a trigonometric one. Trigonometric identities may help simplify the answer. Like other methods of integration by substitution...

differentiation of trigonometric functions is the mathematical process of finding the derivative of a trigonometric function, or its rate of change with respect...

is a list of integrals (antiderivative functions) of trigonometric functions. For antiderivatives involving both exponential and trigonometric functions...