Question: How to simplify the expression " I * ln(cos(m)+I*sin(m)) " ?

April 26 2014 houzenan 15

I use "dsolve([ode_1])" command to solve an ODE, and the solution contains lots of " I * ln(cos(m)+I*sin(m)) " expression. As "m" is real, I think this expression is equal to "-m", but the maple command "simplify" do nothing for this expression. Any one who can simplify the expression by using maple ? or ever puzzled by similar problem ?

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