# Sine, cosine, and tangent of a right triangle.

- Author:
- Mark Humphries

## Move the slider to change angle A in the triangle.

What is the relationship between angle A and angle B?

How does the sinA relate to the sides of the triangle?

How does the cosA relate to the sides of the triangle?

How does the tanA relate to the sides of the triangle?

What is the relationship between the sine, cosine, and tangent of angle A to the sine, cosine, and tangent of angle B?