cos(x)/(cos(x) - one * two) + sin(x)^ two /(cos(x) - one * two)^ two = zero
co sinus of e of (x) divide by ( co sinus of e of (x) minus 1 multiply by 2) plus sinus of (x) squared divide by ( co sinus of e of (x) minus 1 multiply by 2) squared equally 0
co sinus of e of (x) divide by ( co sinus of e of (x) minus one multiply by two) plus sinus of (x) to the power of two divide by ( co sinus of e of (x) minus one multiply by two) to the power of two equally zero