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Module 1: Trigonometry 1

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Right-angled triangles

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XSIQ
*

Core Mathematics - Right-angled triangles

Right-angled triangles

This resource looks at right-angled triangles and the area of a triangle.
It includes information about the sine and cosine rules.

The right-angled triangle above shows the opposite side, the adjacent side
and the hypotenuse [1] of a triangle.

In any right-angled triangle, the trigonometric ratios can be defined as:

* Whenever you are dealing with a right-angled triangle, these are the
ratios you must use:

Find the value of _x,_ correct to two decimal places.

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