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.
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
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.
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