- two *sin(x)*cos(x)/(sin(x)^ two + one)^ two = zero
minus 2 multiply by sinus of (x) multiply by co sinus of e of (x) divide by ( sinus of (x) squared plus 1) squared equally 0
minus two multiply by sinus of (x) multiply by co sinus of e of (x) divide by ( sinus of (x) to the power of two plus one) to the power of two equally zero
-2*sin(x)*cos(x)/(sin(x)2 + 1)2 = 0
-2*sinx*cosx/sinx2 + 12 = 0
-2*sin(x)*cos(x)/(sin(x)² + 1)² = 0
-2*sin(x)*cos(x)/(sin(x) to the power of 2 + 1) to the power of 2 = 0