Question

Prove that the mid point of the line joining points (-5,12) and (-1,12) is a point of trisection of the line joining the points (-8,-5) and (7,10)

Answer 1

Answer:

Step-by-step explanation:

In a triangle ABC,

A+B+C = 180

Thus

A+B = 180-C

A+B/2 = 90-C/2

Thus

sec(A+B/2) = sec(90-[90-C/2])

= cosec (C/2)

Hence proved.