Respuesta :

Answer:

Set your calculator to degree mode.

tan(61°) = AB/21

AB = 21tan(61°)

Let x = the length of the telephone pole.

cos(8°) = 21tan(61°)/x

x•cos(8°) = 21tan(61°)

x = 21tan(61°)/cos(8°) = about 38 feet

38 goes into the box.