# If XcosA +YsinA = p where p = – sin^2A/cos^2A be a straight line ,prove that the prependiculars on thisstraight line from the points ( m^2 , 2m ) , (Mm , M+m ) , ( M^2 ,2M ) form a geometric progression

Ravi
8 years ago
Length of perpendicular from a point (x1, y1) on a line ax+by+c=0 is the absolute value of :

Use it to obtain the 3 perpendiculars and show that
a12= a0.a2