Mathematics | Trigonometry | Sine and cosine rules Sine and cosine rules Trigonometry is often aligned with right-angled triangles only. However, an understanding of trigonometry can also be extended ...

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

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

Sin and Cos often need to be calculated together, which is a very long operation, because they have to be calculated spearately. In some scientific calculations (e.g. my current project) this may ...

This post begins a series on how sin and cos are calculated in the c language standard math library on a typical Linux system. Because Python floats are really c doubles, what I write here applies to ...

These identities are particularly useful because they allow you to express any trigonometric function in terms of sine and cosine – often the key to solving complex problems.

Do you face difficulty memorising trigonometric formulas and table? Here are some quick and easy tips and tricks to learn these formulas and ratios of the trigonometry table. These tips will help ...