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Trigonometry

Formulas to prove trigonometric identities

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

Categories Trigonometry
Triangles for trigonometric ratios of special angles

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

Categories Trigonometry
trigonometric identities exercises

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

Categories Trigonometry
diagram of coterminal angles with sides of angles 2

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

Categories Trigonometry
sum and difference identities in trigonometry

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

Categories Trigonometry
half-angle identities in trigonometry

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

Categories Trigonometry
double angle identities in trigonometry

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

Categories Trigonometry
fundamental trigonometric identities

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

Categories Trigonometry
formulas for the trigonometric identities

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

Categories Trigonometry
quotient identities in trigonometry

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

Categories Trigonometry
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