Trigonometry Help - Calculator

Armchair Engineering

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Makes solving right-angled triangles easy!


Trigonometry Help is a simple triangle calculator that enables you to easily find unknown angles & sides of any right-angled triangle. Quickly find side lengths (base, height & hypotenuse), angles, area & perimeter of right-angled triangles, no maths required!


✔ Accurately solve right-angled triangles
✔ View a handy set of basic trig formulae
✔ Enter angles in radians, decimal degrees or degrees, minutes & seconds (DMS)
✔ View a scale drawing of your solved triangle (turn device to landscape to view)
✔ Select your preferred number of decimal places


Trigonometry Help is the the most straightforward trigonometry calculator around. No need to remember all those tricky trig formulas & functions you learnt years ago, just enter a couple of known values and get answers you need in the blink of an eye!


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+ Bug fixes