These lessons, with videos, examples and step-by-step solutions, help GCSE/IGCSE Maths students learn about the trigonometric ratios: sine, cosine, tangent, secant, cosecant, and cotangent.

**Related Pages**

Trigonometric Graphs

Trigonometric Functions

Lessons On Trigonometry

More GCSE Math Lessons

Math Worksheets

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.

**Six Trig Ratios: sin, cos, tan, csc, sec, and tan**

**Example:**

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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