On Wed, Apr 23, 2008 at 8:34 AM, Hector Villafuerte <[EMAIL PROTECTED]> wrote:
>
> Hi,
> I haven't been able to 'expand' trigonometric functions in Sage using
> identities such as:
> sin(x + y) = sin(x)*cos(y) + sin(y)*cos(x)
>
> Is this currently implemented?
sage:
sage: var('x,y')
(x, y)
sage: f = sin(x+y)
sage: f.tri[tab key]
f.trig_expand f.trig_simplify
sage: f.trig_expand()
cos(x)*sin(y) + sin(x)*cos(y)
sage:
> Thanks in advance,
> --
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