If `A(-2,1),B(2,3)`and `C(-2,-4)`are three points,find the acute angle between line BA and BC.

Solve the following: Find the acute angle between lines having slopes 3 and -2

If A(1,2,3),B(4,5,7) ,C(-4,3,-6) and D(2,9,2) are four given points then find the angle between the lines AB and CD. a) (pi)/(6) b) (pi)/(4) c) (pi)/(3) d) 0

Answer the following questions:Show that the points (2,-1),(0,2),(2,3) and (4,0) are the vertices of a parallelogram.Also find the acute angle between the diagonals.

A(4,3,5),B(0,-2,2) and C(3,2,1) are three points. The coordinates of the point in which the bisector of angleBAC meets the side bar(BC) is

Find the acute angle between the pairs of lines x+3y+5=0 and 2x+y-1=0

If 3 tan^(2)theta - 4sqrt(3)tan theta + 3 = 0, find the acute angle theta .