Спростіть вираз sin^4a + sin^2a * cos^2a - sin^2a +1

Question

Спростіть вираз sin^4a + sin^2a * cos^2a - sin^2a +1

Answer 1

(Sin^4а+sin^2а•cos^2а)-sin^2а+1=sin^2а(sin^2а+cos^2а)-sin^2а+1=sin^2а-sin^2а+1=1