# 12.3 Entering mathematics

##

To enter | Key sequence
--- | ---
| or
| or
| or
| In Math mode: In Linear mode:
| In Math mode: In Linear mode:
| ()

and are mathematical constants.

When using trigonometric functions, ensure that your calculator is set to use the correct units: degrees or radians.

and are calculated in a similar way to .

OpenLearn - Using a scientific calculator
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