Question

A piece of paper in the shape of a sector of a circle of radius 10 cm and of angle 2160 just covers the lateral surface of a right circular cone of vertical angle 2θ, then sinθ= ?

​

Answer 1

Answer:

3/5

Step-by-step explanation:

Given that:

Radius of the sector=10cm and angle =216

∘

To find:

sinθ=?

Solution:

Radius of the sector acts as slant height of the right circular cone which is equal to 10cm.

i.e. l=10cm

Area of the base of right circular cone = Circumference of the sector of angle 216

∘

.

Let

′

r

′

be radius of the base.

or, 2πr=

360

∘

2π×10cm×216

∘

or, r=0.6×10cm

or, r=6cm

∴sinθ=

l/r

=

10cm/6cm

=

3/5

Answer 2

Answer:

sorry sis my brainly sis name also saranya so little bit confused !! btw nice to meet you