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