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Author: William A. Stein
sin?
/ext/sage/sage-8.0/local/lib/python2.7/site-packages/urllib3/contrib/pyopenssl.py:46: DeprecationWarning: OpenSSL.rand is deprecated - you should use os.urandom instead import OpenSSL.SSL
File: /ext/sage/sage-8.0/local/lib/python2.7/site-packages/sage/functions/trig.py Signature : sin(self, coerce=True, hold=False, dont_call_method_on_arg=False, *args) Docstring : The sine function. EXAMPLES: sage: sin(0) 0 sage: sin(x).subs(x==0) 0 sage: sin(2).n(100) 0.90929742682568169539601986591 sage: loads(dumps(sin)) sin sage: sin(x)._sympy_() sin(x) We can prevent evaluation using the "hold" parameter: sage: sin(0,hold=True) sin(0) To then evaluate again, we currently must use Maxima via "sage.symbolic.expression.Expression.simplify()": sage: a = sin(0,hold=True); a.simplify() 0 If possible, the argument is also reduced modulo the period length 2pi, and well-known identities are directly evaluated: sage: k = var('k', domain='integer') sage: sin(1 + 2*k*pi) sin(1) sage: sin(k*pi) 0