Question

Determine the measure of ZA.

45.6°
57.7°
55.2°
32.3°

Answer 1

57.7

Explanation:

took the test

Answer 2

Explanation:

Cos A = 40^2 + 25^2- 34^2 ÷ (2×40×25)

= 200+625-1156 ÷ (2000)

= 1069 ÷2000

Cos A = 0.5345

A= cos inverse 0.5345

A = 57.7