Question

Упростите выражение:

Answer 1

(Sin(x/2)^2+cos(x/2)^2-2sin(x/2)^2)/(2cos(x/2)^2-cos(x/2)^2-sin(x/2)^2)=(cos(x/2)^2-sin(x/2)^2)/(cos(x/2)^2-sin(x/2)^2)=1