Question

(M) length = 5 m 60 cm and breadth = 3 m​

Answer 1

Answer:

Length = 5 meter and 60 cm

500+60 cm = 560 cm or 5.6 m

And breadth = 300 cm or 3 m

Now area will be = length × bteadth

= 5.6 ×3

= 16.8 meter

Or 168000cm

Answer 2

Answer:

Step-by-step explanation:cos a+2 cos((a+2pi/3+a-2pi/3)/2 (cosa+2pi/3-a+2pi/3)/2

cos a +2cos 2a/2 cos 4pi/2*3

cos a + 2cosa cos60degree

cos a +2cos a*-1/2

cosa-cosa

0

hence proved