Trigonometry Calculator

*The following calculator is for reference only.

Find Side when other two sides given
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.