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Today I try to solve a simple ODE: dot{x(t)}=sin(x(t)). Maple gives me the below answer: x(t) = arctan(2*exp(t)*_C1/(1+exp(2*t)*_C1^2), (-exp(2*t)*_C1^2+1)/(1+exp(2*t)*_C1^2)) How comes the arctan function takes two arguments? I solved the equation by myself, and a simple manipulation result in the follwoing result: x(t)=2arctan(C*exp(t)) How can maple end by a 2-argument arctan function?? Help...
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