Вычислите: (arccos(-1/2)-arcsin1/2)^2
(arccos(-1/2)-arcsin1/2)²==( (π- arccos (1/2) - arcsin (1/2))²==(π- (arcsin(1/2) + arccos(1/2)))²=(π-(π/2))²=(π/2)²=π²/4