On 21/06/08 16:04, Bram Moolenaar wrote:
> Why atan() instead of tan()?
[...]
Because tan(x) == sin(x) / cos(x), but the arctangent function isn't
that easy to derive.
Note that atan2(x,y) is usually more precise (sometimes _very much_
more) than atan(x/y), especially when the size of x and/or y would
entail rounding/overflow errors in an intermediate result.
Best regards,
Tony.
--
There was a young lady from Hyde
Who ate a green apple and died.
While her lover lamented
The apple fermented
And made cider inside her inside.
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