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2015-01-11 18:45:43 +0200 received badge  Scholar (source)
2015-01-11 18:44:49 +0200 commented answer Symbolic math problem

Thanks. Now it works

2015-01-11 18:19:33 +0200 received badge  Editor (source)
2015-01-11 18:18:01 +0200 asked a question Symbolic math problem

I need find in sage numberic value of expression like

s=cos(99.9500000000000*pi + 199.900000000000*pi*real_part(sgn(sin(49.9750000000000*pi))))*e^(-199.900000000000*pi*imag_part(sgn(sin(49.9750000000000*pi)))) + 1

but s.n() gives error "TypeError: cannot evaluate symbolic expression numerically". How to resolve this problem?

2015-01-11 18:17:00 +0200 asked a question square wave

I need find in sage numberic value of expression like

s=cos(99.9500000000000*pi + 199.900000000000*pi*real_part(sgn(sin(49.9750000000000*pi))))*e^(-199.900000000000*pi*imag_part(sgn(sin(49.9750000000000*pi)))) + 1

but s.n() gives error "TypeError: cannot evaluate symbolic expression numerically". How to resolve this problem?