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