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Exact Trigonometric Values

Exact Trigonometric Values

Exact Trigonometric Values

Some values of Sin, Cosine and Tangent return exact values, and it is handy to remember these.

There are some values of Sin, Cos and Tan which return exact values, either as whole numbers, fractions or surds. This lesson will teach you the ones that are important to remember.

The important angles to be aware of are 30°30\degree, 45°45\degree and 60°60\degreeWe can use a simple diagram to show the exact values of trigonometry ratios at these angles.

What is cos(45)cos(45)?

In general, memorising these values is a great addition to your maths toolbox.