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To illustrate this point further, I modified question 1 to:
The following two answers (which in reality are correct) are
interpreted as wrongly written, or wrong, respectively:
0.25 *cos(t/8)/sin(t/8) is not written as required. Please rewrite it in the correct form.
0.25*cot(0.125*t) bad answer, the correct answer is cos(t/8)/(4*sin(t/8)).
Introducing more correct answers by applying
maxima(float(…);) to each of the existing correct answers and
adding these new ones to the list can, again, allow these two specific
examples to be accepted as correct. But then
float to be applied before trigreduce. I don’t see how a more complex
question can have a reasonably short list of correct answers rather
than growing longer factorially.