anonymous
  • anonymous
Simplify: (sin Θ − cos Θ)2 + (sin Θ + cos Θ)2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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Nnesha
  • Nnesha
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
Nnesha
  • Nnesha
familiar with the foil method ?
anonymous
  • anonymous
hm could you help me out a little bit more

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Nnesha
  • Nnesha
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
Nnesha
  • Nnesha
|dw:1438884851326:dw| first multiply 2nd parentheses by x and then multiply by -y
Nnesha
  • Nnesha
|dw:1438884893981:dw|
anonymous
  • anonymous
would the answer be -cos^2 with the 0 with the line through it
Nnesha
  • Nnesha
nah how did you get that . show your work.
anonymous
  • anonymous
ok so would it be 0 or 2?
Nnesha
  • Nnesha
how did you get that are u just guessing or did you worke it out?
anonymous
  • anonymous
i worked it out
Nnesha
  • Nnesha
okay so(x-y)(x-y) = ??
anonymous
  • anonymous
can you tell me the answer please
Nnesha
  • Nnesha
no I can't if you just need an answer better to use google for that :=)
Nnesha
  • Nnesha
let me know if you need to know how it works i will happy to help you :=)
Nnesha
  • Nnesha
be*

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