
Calculating Angles with Trig Functions
10th Grade · Math · 45 min
Lesson Preview
Learning Objective
I can calculate the measure of an angle in a right triangle using sine, cosine, or tangent.
- 1
Trigonometry is the study of the ratios of sides of triangles.
- 2
The mnemonic SOH CAH TOA is helpful for remembering that Sine = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, and Tangent = Opposite/Adjacent.
- 3
The hypotenuse is the side opposite the right angle in a right triangle and is always the longest side.


