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
60°
B​

Answer 1

Step-by-step explanation:

PA=PB=7cm

<APB=60

<PAB=<PBA

by cosine law

AB²=AP²+BP²-2×AB×BP cosø

AB²=7²+7²-2×7×7×cos60

AB²=49+49-2×49×1/2

AB²=49+49-49

AB²=49

AB= root(49)=7cm