(sin(x))^2
Объяснение:
(sin(x))^4-(cos(x))^4+(cos(x))^2 = ((sin(x))^2-(cos(x))^2)((sin(x))^2+(cos(x))^2)+(cos(x))^2=
(sin(x))^2-(cos(x))^2+(cos(x))^2 = (sin(x))^2
где ^-степень
