Question

In the figure given below, PA and PB are the tangents to a
circle such that PA = 7 cm and ZAPB = 60°. The length of
the chord AB is​

Answer 1

Answer:

Given PA=10cm,∠APB=60

o

triangle PAB is an isosceles triangle

So, △OPA is a righgt angled triangle

∠OPA=30

o

Using sine rule,

AO

sin30

o

=

10

sin90

o

AO=5cm

length of the chord AB=2AO=10cm