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Right Triangle Cosine Ratio

Calculate cosine of angle using the right triangle cosine ratio formula.

Cosine of angle: -
Visual representation

Right Triangle Cosine Ratio diagram

The diagram updates with your entries and is illustrative, not necessarily drawn to scale.

Calculation explained

How this result was calculated

The formula, your substituted values, and the evaluated result are shown below.

Reference: Formulae and Tables, State Examinations Commission (2014), page 14.
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How the Right Triangle Cosine Ratio works

This calculator applies the formula given in Formulae and Tables, State Examinations Commission (2014), page 14. Enter values in consistent units.

Formula and inputs

adjacent ÷ hypotenuse

Inputs: Adjacent side, Hypotenuse.

Using the result

The result is rounded to 6 decimal places. Check units, assumptions and significant figures before using the answer.

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