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The MAXIMA flag numer controls numerical evaluations. Floating point numbers are double precision (64 bit i.e. fpprec set to 16). The MAXIMA computation
(C12) sin(x^2); 2 (D12) SIN(X ) (C13) ev(d12,x=%pi/5),numer; (D13) 0.3846089750773245shows how you get the value of at .
For extended precision floating-point computations fppreccan be set to a larger number. In this case, the Maxima function bfloat is used to compute with big floats. For example,
(c14) fpprec:40; (c15) bfloat(sqrt(%pi));gives the square root of to 40 digits.