Precision with Decimal Type

[charlesrkiss]

Hello Perfringo,

You can see in the second balloon above (repeated below) how theta is close to a ninety-digit number that I input to math.cos, but my interpreter sends back a single digit, despite my two attempts (to force a decimal). What am I missing here?

>>> theta=Decimal('1.00000000000000010105568267120302867849435113356548754381947219371795654296875E-11')
>>> print(math.cos(theta))
1.0
>>> B=Decimal(math.cos(theta))
>>> print(B)
1

Thank you!