Question

next one xd @AZ

Answer 1

hmm, let's just open 'em up and see what we're dealing with

remember

\( (a+b)^2 = a^2 + 2ab + b^2\)

\( (a-b)^2 = a^2 - 2ab + b^2\)

Answer 2

sin^2 x + cos^2 x + 2sinxcosx + sin^2 x + cos^2 x -2sinxcosx

Answer 3

aha, now I see it so perfectly like day and night

Answer 4

just simplify, what do you get?

remember that
sin^2 x + cos^2 x = 1

Answer 5

oh

i'm dumb xddddddddddddddddddddddd
thank youuuuuuuuuuuuuuuuuuu

Answer 6

you're welcome!

Answer 7

hehe