Calculate

Error

Angle

Hypotenuse

Adjacent

Opposite

What is trigonometry

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.

To calculate all the sides or angles depending on which you already have you just remodel one of the terms a bit or let this calculator handle it for you.

Right Triangle
  1. Hypotenuse

    (longest side, opposite to the right angle)

  2. Opposite

    (the side opposite to alpha)

  3. Adjacent

    (the side touching alpha)

Further reading

For more information about the trigonometric tables which are used in for example calculators to calculate trigonometric functions check out this wikipedia article

Since wikipedia is always helpful you can also take a look at their article about trigonometry

If you’re not sure how the trigonometric functions work or why they are so useful also check out this youtube playlist as well as the creator of those videos

Sinewave

sinewave

Cosinewave

cosinewave