sin^2 a - sin^2 a cos^2 sin^2 a(1 - cos^2 asin^2 a sin^2 (sin a sin a) (sin a sin asin^2 a sin^2 (sin^2 a)^2
Ответ: (sin^2 a)^2
sin^2 a - sin^2 a cos^2
sin^2 a(1 - cos^2 a
sin^2 a sin^2
(sin a sin a) (sin a sin a
sin^2 a sin^2
(sin^2 a)^2
Ответ: (sin^2 a)^2