(two + two *cos(x)^ two /sin(x)^ two)*cos(x)/sin(x) = zero
(2 plus 2 multiply by co sinus of e of (x) squared divide by sinus of (x) squared ) multiply by co sinus of e of (x) divide by sinus of (x) equally 0
(two plus two multiply by co sinus of e of (x) to the power of two divide by sinus of (x) to the power of two) multiply by co sinus of e of (x) divide by sinus of (x) equally zero
(2 + 2*cos(x)2/sin(x)2)*cos(x)/sin(x) = 0
2 + 2*cosx2/sinx2*cosx/sinx = 0
(2 + 2*cos(x)²/sin(x)²)*cos(x)/sin(x) = 0
(2 + 2*cos(x) to the power of 2/sin(x) to the power of 2)*cos(x)/sin(x) = 0
(2 + 2cos(x)^2/sin(x)^2)cos(x)/sin(x) = 0
(2 + 2cos(x)2/sin(x)2)cos(x)/sin(x) = 0
2 + 2cosx2/sinx2cosx/sinx = 0
2 + 2cosx^2/sinx^2cosx/sinx = 0
(2 + 2*cos(x)^2 divide by sin(x)^2)*cos(x) divide by sin(x) = 0