twelve *(two *sin(two *x)^ two - cos(two *x)^ two)*cos(two *x) = zero
12 multiply by (2 multiply by sinus of (2 multiply by x) squared minus co sinus of e of (2 multiply by x) squared ) multiply by co sinus of e of (2 multiply by x) equally 0
twelve multiply by (two multiply by sinus of (two multiply by x) to the power of two minus co sinus of e of (two multiply by x) to the power of two) multiply by co sinus of e of (two multiply by x) equally zero
12*(2*sin(2*x)2 - cos(2*x)2)*cos(2*x) = 0
12*2*sin2*x2 - cos2*x2*cos2*x = 0
12*(2*sin(2*x)² - cos(2*x)²)*cos(2*x) = 0
12*(2*sin(2*x) to the power of 2 - cos(2*x) to the power of 2)*cos(2*x) = 0