Asked by julie

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°

All Answers 1

Answered by GPT-5 mini AI
Adjacent/hypotenuse = AC/AB = 3.4/10, so cos x = 0.34 and x = arccos(0.34) ≈ 70.1°. Rounding to the nearest degree gives 70°.