Videos and lessons with examples and solutions to help GCSE/IGCSE Maths students
learn about the trigonometric ratios: sine, cosine and tangent.

Trigonometry - Right Angled Triangles - Naming the Sides

In this tutorial you are shown how to name the sides of any right angled triangle which is the first stage in solving a question in trigonometry.
Trigonometry - The Trig Ratios

In this tutorial you are shown how the sin, cos and tan ratios compare two sides of a right angled triangle. You need to know this before calculating lengths and angles of right angled triangles.

Trigonometric Ratios

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

In this tutorial you are shown how to name the sides of any right angled triangle which is the first stage in solving a question in trigonometry.

In this tutorial you are shown how the sin, cos and tan ratios compare two sides of a right angled triangle. You need to know this before calculating lengths and angles of right angled triangles.

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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