👉 Learn how to evaluate the six trigonometric functions given a right triangle. A right triangle is a triangle with 90 ...

Learn all about the trigonometry of right triangles. A right triangle is a triangle that has 90 degrees as one of its angles.

There are two versions of the cosine rule: Find an unknown side using 𝑎² = 𝑏² + 𝑐² – 2𝑏𝑐 cos𝐴 Find an unknown angle using cos𝐴 = \(\frac{𝑏² + 𝑐² – 𝑎²}{2𝑏𝑐}\) Scientific calculators need to ...