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quinyu · (This post was last modified: 01-02-2016 10:44 AM by quinyu.)

I did not know about the "no parentheses" rule. When clicking on the toolbox, the parenthesised one is added to the entry line. My bad. And even the CAS reapplies the parentheses when I enter such line ( equation(LineTan sin(x),0) comes back as equation(LineTan(sin(x),0)) )... confusing, to say the least.

All the same, equation(LineTan Sin(x),pi) still returns an error, even though (as shown above) the function does have a tangent at the place with a proper form. equation(LineTan Cos(x),pi) works. Many other fractions/multiples of pi also work and deliver the proper tangent equation. I might be doing something wrong, or the CAS does.