Trigonometry Calculator

*The following calculator is for reference only.

Find Side when other two sides given
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Find Sides when side and angle given
Find Angle when sides given
Why Right Angle Traingle

Right angle triangle so important?

The triangle of most interest is the right-angled triangle. The right angle is shown by the little box in the corner

Another angle is often labeled θ, and the three sides are then called:
Adjacent: adjacent (next to) the angle θ
Opposite: opposite the angle θ
and the longest side is the Hypotenuse
The main functions in trigonometry are Sine, Cosine and Tangent. They are simply one side of a right-angled triangle divided by another.
For any angle “θ”:

Pythagoras’ Theorem states that:

Where: a, b, and c are the lengths of the sides of a right-angle triangle and c is the length of the hypotenuse.