Question

Convert 120° to radians. a) 4(pie)/3 b) pie/3 c) 2(pie)/3 d) 5(pie)/3

Answer 1

c

Explanation:

to convert from degrees to radians

radians = degrees ×
`(\pi )/(180)`

substitute 120° , then

radians = 120° ×
`(\pi )/(180)` ( cancel 120 and 180 by 60 )

= 2 ×
`(\pi )/(3)`

=
`(2\pi )/(3)`