Proving Trigonometric Identities with Examples

The trigonometric identities can be proved by using other, simpler trigonometric identities. Then, we can use the simple identities to … Read more

Trigonometric Ratios of Special Angles

Special angles are angles that have values that are common in trigonometry exercises and in everyday life in general. Generally, … Read more

Trigonometric Identities Problems

Trigonometric identities are equations that are true for any angle used. These identities are used to rewrite and simplify complex … Read more

Coterminal Angles – Formulas and Examples

Coterminal angles are angles that have the same initial side and the same terminal side. The coterminal angles are equivalent … Read more

Sum and Difference Identities – Formulas and Examples

The sum and difference identities of angles are trigonometric identities used to calculate the values of certain angles. These identities … Read more

Half-angle identities – Formulas, proof and examples

Half-angle identities are trigonometric identities used to simplify trigonometric expressions and calculate the sine, cosine, or tangent of half-angles when … Read more

Double Angle Identities – Formulas, Proof and Examples

Double angle identities are trigonometric identities used to rewrite trigonometric functions, such as sine, cosine, and tangent, that have a … Read more

Fundamental Trigonometric Identities

Trigonometric identities are equations, which are true for any angle used. Trigonometric identities are used to rewrite trigonometric expressions and … Read more

Formulas for the Trigonometric Identities

Trigonometric identities are useful when we want to rewrite or simplify trigonometric expressions. Trigonometric identities are true for every value … Read more

Quotient Identities – Formulas and Examples

Quotient identities are trigonometric identities that are written as fractions of the sine and cosine functions. The tangent forms a … Read more