Question

will medal for help
Simplify: (sin Θ − cos Θ)^2 + (sin Θ + cos Θ)^2

Answer 1

let sin x= a
and cos = b
to make it look s easier :P \[\huge\rm (a-b)^2+(a+b)^2\]
familiar wit the foil method ?

Answer 2

ive heard of it before but I cant remember how it goes

Answer 3

alright
(a-b)^2 is same as (a-b)(a-b)
first multiply first term with the 2nd parentheses
and then multiply 2nd term of 1st parentheses by 2nd one