Cosine function erro

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Shaun Ault

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Sep 12, 2016, 1:31:08 PM9/12/16

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Dear sage-support,

I'm getting the following unexpected results:

sage: cos(2*pi*4/7).n()
0.900968867902419
sage: cos((2*pi*4/7).n())
-0.900968867902419

What is going on here? Clearly the result should be negative both times.

Thanks,
Shaun Ault

leif

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Sep 12, 2016, 1:42:40 PM9/12/16

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Which version? (Works for me in 7.3.)

-leif

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