Question

помогите плиизз!!!!!!​

Answer 1

$a);sin^4alpha+sin^2alphacos^2alpha+cos^2alpha=sin^2alpha(sin^2alpha+cos^2alpha)+cos^2alpha=\=sin^2alpha+cos^2alpha=1\\b);sin^4alpha+2sin^2alphacos^2alpha+cos^4alpha=(sin^2alpha+cos^2alpha)^2=1^2=1$

Answer 2

Спасибо за ответ на вопрос