Question

1. cos 0 - cos 20 = sin 30​

Answer 1

Given:-

Length of rectangle(l) = 7.1cm

Breadth of rectangle(b) = 4.5cm

To Find:- Perimeter of rectangle

Solution :-

Perimeter of rectangle = 2(l+b)

⇒ 2(l+b) = 2(7.1+4.5)

= 2(11.6)

= 23.2

Hence, the perimeter of rectangle is 23.2 cm.