two *(x*(sin(x)^ two - cos(x)^ two) + two *sin(x)*cos(x)) = zero
2 multiply by (x multiply by ( sinus of (x) squared minus co sinus of e of (x) squared ) plus 2 multiply by sinus of (x) multiply by co sinus of e of (x)) equally 0
two multiply by (x multiply by ( sinus of (x) to the power of two minus co sinus of e of (x) to the power of two) plus two multiply by sinus of (x) multiply by co sinus of e of (x)) equally zero
2*(x*(sin(x)2 - cos(x)2) + 2*sin(x)*cos(x)) = 0
2*x*sinx2 - cosx2 + 2*sinx*cosx = 0
2*(x*(sin(x)² - cos(x)²) + 2*sin(x)*cos(x)) = 0
2*(x*(sin(x) to the power of 2 - cos(x) to the power of 2) + 2*sin(x)*cos(x)) = 0