Find the angle subtended at the origin by the line segment whose end points are (0,100) and (10, 0).

Question

Philoid · Accepted Answer

Since the abscissa of first coordinate is zero, therefore this point lies on y-axis. Ordinate of second point is zero, therefore this point lies on y-axis. We know that both the axes are perpendicular to eachother, therefore the angle between these points is 90°.