hey there

My question is: why is it that when you have a radian value expressed as a decimal you do not need to specify it as a radian value in your calculator.

So for example:

Example: if the value was $\displaystyle \pi/8$ I would need to specify it was radians. But a value like 0.6 doesn't have to be specified...but it is still in radians.

Can someone explain this to me please