6.4 Inverse Trigonometric Functions and Right Triangles
Ideas in this lesson
- Evaluating inverse trig functions in degrees
- Finding angles in right triangles
- Exact values of compositions
Evaluating inverse trig functions in degrees · Worked example
cos⁻¹ \frac{√3}{2} = ?
Answer: 30°
cos 30° = \frac{√3}{2}.