anonymous
  • anonymous
cos2a = 1-2sin^2(a) for all values of a A. True B. False
Mathematics
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anonymous
  • anonymous
cos2a = 1-2sin^2(a) for all values of a A. True B. False
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
Once again with my improper math techniques I believe it is True because cos2a does equal 1-2sin^2a
butterflydreamer
  • butterflydreamer
LOLLLLLL. Are you just using guess and check?
anonymous
  • anonymous
Yep

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butterflydreamer
  • butterflydreamer
Cos2x = 1 - 2sin^2x is a trig identity that you need to know.
anonymous
  • anonymous
Ah ok. I will find a list and study! Thank you for telling me that
butterflydreamer
  • butterflydreamer
no problem :)
anonymous
  • anonymous
I know one day the improper math techniques are going to bite me in the butt
butterflydreamer
  • butterflydreamer
xD probably...
anonymous
  • anonymous
So I am assuming this question is true.
butterflydreamer
  • butterflydreamer
yes it is truee.. Cos 2x has three different things it could equal to :) http://prntscr.com/7j2qax
anonymous
  • anonymous
Great! Thank you for the help!
butterflydreamer
  • butterflydreamer
no problemoooo~

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