1.The integration uncertain border value is estimated by fuzzy inference and the soft switch control is accomplished by tanh(x) function replacing sgn(x).
6.So, for example, I don't think that being a math person means that you can recite the formulas between the sines, cosines, tangents and to use logarithms and exponentials interchangeably.
7.I studied trigonometry for a month. I sometimes dreamed about sine, cosine and tangent, about mysterious angles and concussed computations, but for all this I made no real progress. I could not self-teach trigonometry. But I knew someone who had.