Change -40° to radians. a). 2π/9 b). -2π/9 c). 4π/9 d). -4π/9

To solve this, we are going to multiply our degrees by a conversion factor. Remember that 1°=, so to convert -40° to radians, we are going to multiply -40° by the conversion factor ; that way we can cancel degrees and express our answer in radians:

(-40°)

We can conclude that the correct answer is: B). -2π/9