let sinx = x cos x= y \[\huge\rm (x-y)^2 +(x+y)^2\] (x-y)^2 is same as (x-y)(x-y) apply foil method
familiar with the foil method ?
hm could you help me out a little bit more
alright so foil (x-y)(x-y) here is an example a(b+c) multiply both terms by a a times b+a times c
|dw:1438884851326:dw| first multiply 2nd parentheses by x and then multiply by -y
would the answer be -cos^2 with the 0 with the line through it
nah how did you get that . show your work.
ok so would it be 0 or 2?
how did you get that are u just guessing or did you worke it out?
i worked it out
okay so(x-y)(x-y) = ??
can you tell me the answer please
no I can't if you just need an answer better to use google for that :=)
let me know if you need to know how it works i will happy to help you :=)