In triangle RPS, an exterior angle at R measures 64º, and Triangle?

Which speed is the fastest (use 1 mile ≈ 1.6 kilometers)? a. 12 miles/hour b. 18 feet/second c. 19 kilometers/hour d. cannot be determined

What term makes it inconsistent y=2x - 4

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).