# Revision history [back]

### translation of atan from fricas to sage causes error

This one seems to be that there is no translation from fricas to sage. Is this due to the atan ?

       sage:  var('x a')
sage:  integrate(1/(1+a*cos(x)),x,algorithm="fricas")

NotImplementedError: The translation of the FriCAS Expression "atan(((cos(x)+a)*((-1)*a^2+1)^(1/2))/((a^2+(-1))*sin(x)))/(((-1)*a^2+1)^(1/2)) to sage is not yet implemented.


Using Sage version 8.3.beta6

### translation of atan from fricas to sage causes error

This one seems to be that there is no translation from fricas to sage. Is this due to the atan ?

       sage:  var('x a')
sage:  integrate(1/(1+a*cos(x)),x,algorithm="fricas")

NotImplementedError: The translation of the FriCAS Expression "atan(((cos(x)+a)*((-1)*a^2+1)^(1/2))/((a^2+(-1))*sin(x)))/(((-1)*a^2+1)^(1/2)) to sage is not yet implemented.


Using Sage version 8.3.beta6

### translation of atan errors from fricas to sage causes errorsage

Sorry that I do not know if these are known issues or not. Thought to report them. If there are known, feel free to close this.

Using Sage version 8.3.beta6

This one seems to be that there is no translation from fricas to sage. Is this due to the atan ?

       sage:  var('x a')
sage:  integrate(1/(1+a*cos(x)),x,algorithm="fricas")

NotImplementedError: The translation of the FriCAS Expression "atan(((cos(x)+a)*((-1)*a^2+1)^(1/2))/((a^2+(-1))*sin(x)))/(((-1)*a^2+1)^(1/2)) to sage is not yet implemented.


Using Sage And this one

version 8.3.beta6sage: var('x a b')
sage: anti=integrate(1/(b*x^2+a),x,algorithm="fricas")

NotImplementedError: The translation of the FriCAS Expression "log(((b*x^2+(-1)*a)*((-1)*a*b)^(1/2)+2*a*b*x)/(b*x^2+a))/(2*((-1)*a*b)^(1/2)) to sage is not yet implemented.


### translation errors from fricas to sage

Sorry that I do not know if these are known issues or not. Thought to report them. If there are known, feel free to close this.reported at https://trac.sagemath.org/ticket/25628

Using Sage version 8.3.beta6

This one seems to be that there is no translation from fricas to sage. Is this due to the atan ?

       sage:  var('x a')
sage:  integrate(1/(1+a*cos(x)),x,algorithm="fricas")

NotImplementedError: The translation of the FriCAS Expression "atan(((cos(x)+a)*((-1)*a^2+1)^(1/2))/((a^2+(-1))*sin(x)))/(((-1)*a^2+1)^(1/2)) to sage is not yet implemented.


And this one

sage: var('x a b')
sage: anti=integrate(1/(b*x^2+a),x,algorithm="fricas")

NotImplementedError: The translation of the FriCAS Expression "log(((b*x^2+(-1)*a)*((-1)*a*b)^(1/2)+2*a*b*x)/(b*x^2+a))/(2*((-1)*a*b)^(1/2)) to sage is not yet implemented.