Math

Trigonometry calculator

sin, cos, tan of an angle in degrees or radians, and the inverse functions.

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Copy this code and paste it into your page (WordPress, Wix, Webflow, HTML…). It's free: please keep the link to HOD Calc.

<iframe src="https://calc.hod-group.com/embed/?hodtool=trig&amp;hodlang=en" title="Trigonometry calculator" loading="lazy" style="width:100%;max-width:720px;height:560px;border:0;border-radius:12px" data-hodcalc></iframe>
<p style="font:13px sans-serif;margin:6px 0 0">Calculator by <a href="https://calc.hod-group.com/en/trigonometry-calculator/">HOD Calc</a></p>
<script async src="https://calc.hod-group.com/assets/embed.js"></script>

How it works

Radians = degrees × π / 180. Notable values: sin 30° = 1/2, cos 60° = 1/2, tan 45° = 1.

Results are for guidance only and do not replace professional advice.

Worked example

With the default values:

Angle or value30
UnitDegrees

you get:

sin0.5
cos0.8660254038
tan0.5773502692
In radians0.52359878 rad

Frequently asked questions

How does the “Trigonometry calculator” tool work?

Radians = degrees × π / 180. Notable values: sin 30° = 1/2, cos 60° = 1/2, tan 45° = 1.

What do I need to enter?

Just fill in: angle or value, unit. The result updates as you type.

Can you give an example?

Angle or value: 30; Unit: Degrees → sin: 0.5; cos: 0.8660254038.

Is this calculator free, and is my data private?

Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.