Question

In right triangle ABC, m∠B = 90° and cos A = 11/17. What are m∠A and m∠C to the nearest degree?

m∠A = 40°, m∠C = 50°

m∠A = 60°, m∠C = 30°

m∠A = 35°, m∠C = 55°

m∠A = 50°, m∠C = 40°

Answer 1

The easiest way to answer this is to take arc cos 11/17, which

in round numbers is 50 degrees. That's angle A.

So angle C is 90 = 50 = 40 degrees