Question

I hope you understand this question​

Answer 1

Answer:

(sin∅+cos∅)²+(sin∅-cos∅)²=2

sin²∅+cos²∅+2.sin∅.cos∅+sin²∅+cos²∅-2.sin∅.cos∅

1+2.sin∅.cos∅+1-2.sin∅.cos∅. (:sin²∅+cos²∅=1)

1+1. (: +2.sin∅.cos∅-2.sin∅.cos∅ are cancelled)

=2