When James solved cos x = he got x = cos⁻¹. His calculator told him that
x = 1.047. Verify that this corresponds to the exact solution . Homework Help ✎

1. We also know is a solution to x = cos⁻¹, but the calculator doesn’t give that answer. Why?

2. Write the complete solution to cos x = .

3. Can you get the complete solution entirely from your calculator, or do you have to draw and think?