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Trigonometric Ratios

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Examples, videos, lessons, and solutions to help GCSE/IGCSE Maths students learn about the trigonometric ratios: sine, cosine, tangent, secant, cosecant, and cotangent.

The following diagram shows the six trig ratios: Sin, Cos, Tan, Sec, Csc, and Cot. Scroll down the page for more examples and solutions on the trigonometric ratios.
Trig Ratios

Six Trig Ratios: sin, cos, tan, csc, sec, and tan
Determine the six trigonometric ratios for angle A in the right triangle.
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

Try the free Mathway calculator and problem solver below to practice various 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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