The equation cos super negative 1 (StartFraction 3.4 Over 10 EndFraction)equals x can be used to determine the measure of angle BAC.

Triangle A B C is shown. Angle A C B is a right angle. The length of hypotenuse A B is 10 centimeters and the length of A C is 3.4 centimeters. Angle C A B is x.

What is the degree measure of angle BAC? Round to the nearest whole degree.

19°

20°

70°

71°