cos(x)/sqrt(one - cos(x)) - sin(x)^ two /(two *(one - cos(x))^(three / two)) = zero
co sinus of e of (x) divide by square root of (1 minus co sinus of e of (x)) minus sinus of (x) squared divide by (2 multiply by (1 minus co sinus of e of (x)) to the power of (3 divide by 2)) equally 0
co sinus of e of (x) divide by square root of (one minus co sinus of e of (x)) minus sinus of (x) to the power of two divide by (two multiply by (one minus co sinus of e of (x)) to the power of (three divide by two)) equally zero