For centuries, students have learned that in a right triangle, the square of the hypotenuse equals the sum of the squares of the other two sides. Known as the Pythagorean Theorem, this ...

Trigonometric sums and summation formulas have long served as essential tools for elucidating periodic phenomena across mathematics and the physical sciences. These techniques entail the explicit ...

What are Angle Formulas in trigonometry? Know definitions and types of angles formulas with solved examples.

In 2022, two high school students created a trigonometric proof of the Pythagorean Theorem—something that’s only ever been accomplished by a few professional mathematicians. Now, a new article ...

De Moivre's theorem: Polar form using argument and modulus; Statement and proof of De Moivre's theorem; Derivation of trigonometric formula; Calculation of higher powers and roots of a complex number ...

Revise trigonometric ratios of sine, cosine and tangent and calculate angles in right-angled triangles with this Bitesize GCSE Maths Edexcel guide.

Revise how to use the sine and cosine rules to find missing angles and sides of triangles as part of National 5 Maths.