Angle Formulas in Trigonometry: Definition, Representaion, Questions & More Check definition and formulas for central angle, double angle and multiple angles.

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

Classical trigonometry calls the separation between two lines an "angle", which is the length of a circular arc between two lines.

I'm talking about trigonometry, of course: that bastion of angles and triangles that is essential to calculating velocity, momentum, and much more.

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