We have the equation of the line
18x-3y-21=0.
18x - 3y - 21 =
0
=> -3y = 21 -
18x
=> 3y = -21 +
18x
=> y = -7 + 6x
Now
y = 6x - 2 is in the form where the slope is 6 and the y-intercept is
-7.
The slope of the line is the tangent of the angle it
makes with the x-axis.
So if the angle made is A, tan A =
6
A = arc tan 6.
A = 80.53
degrees.
Therefore the line makes an angle
80.53 degrees with the x- axis.
No comments:
Post a Comment