Question

Find the acute angle between the X-axis and the line joining points A(3,-1) and B(4,-2).​

Answer 1

Answer:

your answer dear...........

Answer 2

Answer:

45°

Step-by-step explanation:

let a be the required angle:

slope of line joining ( 3,-1) and ( 4,-2) :

(4-3)/(-2+1) = -1 =m1

and slope of x-axis is 0 = m2

therefore,

tan a =( m1+m2)/(1-m1m2)

or, tan a = -1/ 1

hence angle= 45° ( 4th quadrant for -ve sign)