Question

I'll mark u as brain list if u ans this one correct

Answer 1

Answer:

1. 2

Step-by-step explanation:

1. (sinA + cosA)² + (sinA - cosA)²

= sin²A + cos²A + 2sinA.cosA + sin²A + cos²A - 2sinA.cosA

= 1 + 2sinA.cosA + 1 - 2sinA.cosA

= 1 + 1

= 2.

2.

I know the first one.Hope you will get some help!

Answer 2

1.4sin αcosα

sin^2α+cos^2α+2sinαcosα-sin^2α-cos^2α+2sinαcosα

=4sinαcosα