Question

iv) Radius of a circle is 34 cm and the distance of the chord from the centre is 30 cm find the length of the chord

V) If sine0=4/5 then find cos 0 and tan 0​

Answer 1

Answer:

R.E.F image

Given radius of circle = 34 cm

distance of chord form center = 30 cm

Given OA=34cm

OC=30cm

△OAC is right angled

By applying Pythagorean's theorem

OA

2

=OC

2

+AC

2

AC

2

=OA

2

−OC

2

(34)

2

−(30)

2

=1156−900

=256

AC=

256

=16cm

∴ length of chord = 2AC = AB 2(16 cm)

=32cm