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