Find the arc length of a sector of a circle with a radius of 5 meters and a central angle of 135 degrees.

Question

After that, find the perimeter of the sector. Then, describe the language of transformations how y= -4cos2x/5 is related to y= cosx

Answer 1

Arc length = (central angle/360) circumference

 

C = πd                d = diameter

 

Arc length = (135/360) π(10m)

 

                 = 3.75π

 

                 = 11.781

 

Perimeter = 5 + 5 + 11.781

 

                = 21.781

 

I will check on the second part of your question, I have to give a lesson soon.