python - cosd and sind with sympy -

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there seems no equivalent cosd, sind in sympy (ie cosine , sine arguments in degrees). there simple way implement functions ?

for numpy, did :

numpy.cosd = lambda x : numpy.cos( numpy.deg2rad(x) )

something :

sympy.cosd = lambda x : sympy.cos( sympy.pi/180*x )

works evaluation, expression printed :

cos(pi*x/180)

which not great readability (i have complicated expression due 3d coordinates changes). there way create sympy.cosd function evaluates cos(pi/180 * x) prints cosd(x)?

sympy have radian converter, in mpmath module. 

sympy.cosd = lambda x : sympy.cos( sympy.mpmath.radians(x) )

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