Question

Please solve question 21 urgently!

Answer 1

in ∆pac and ∆ qbc

angle a = angle b ( 90 each)

angle p = angle q ( corresponding angles)

∆ pac ~∆qbc

x/ y=ac/ bc......eqn1 ( cpst)

lly ∆ rac~∆qab

z/ y =ac / ba.....eqn2 ( cpst )

on adding 1 and 2

x/ y + z/ y = ac/bc + ac/ ab

on reciprocal

1/x+1/y = 1/z

hence proved

Answer 2

Hope it helps you ..........