Answer:
The answer to your question is 40.60°
Explanation:
Data
Right triangle
Opposite side = 6
Adjacent side = 7
Process
1.- To find angle A, use trigonometric functions.
The trigonometric function that relates the opposite side and the adjacent side is tangent 
 tanA = 

2.- Substitution
 tan A = 

3.- Find tan⁻¹A
 tan⁻¹ A = A = 40.60°