Rewrite -25 degree in radian form ?

Question

Rewrite -25 degree in radian form ?

Answer 1

Radian = degree * 2π/360

-25 * 2π/360 = -50π/360 = -5π/36

You could also add a 2π to make it positive:

2π + (-5π/36) = 72π/36 - 5π/36 = 67π/36

They are both the same angle, yet one is written positive and the other negative

Answer 2

the guy above me is right, just a few things...

1) to convert to radians, multiply by pi/180, not 2pi/360. same thing I know, but it will save you some reducing time in the end

2) if you want the positive measurement, it's easier to rewrite -25 as 335 then convert

3) 99.9% of the time you'll want -5pi/12 as opposed to 67pi/36