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anonymous

  • one year ago

cos2a = 1-2sin^2(a) for all values of a A. True B. False

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  1. anonymous
    • one year ago
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    Once again with my improper math techniques I believe it is True because cos2a does equal 1-2sin^2a

  2. butterflydreamer
    • one year ago
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    LOLLLLLL. Are you just using guess and check?

  3. anonymous
    • one year ago
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    Yep

  4. butterflydreamer
    • one year ago
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    Cos2x = 1 - 2sin^2x is a trig identity that you need to know.

  5. anonymous
    • one year ago
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    Ah ok. I will find a list and study! Thank you for telling me that

  6. butterflydreamer
    • one year ago
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    no problem :)

  7. anonymous
    • one year ago
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    I know one day the improper math techniques are going to bite me in the butt

  8. butterflydreamer
    • one year ago
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    xD probably...

  9. anonymous
    • one year ago
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    So I am assuming this question is true.

  10. butterflydreamer
    • one year ago
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    yes it is truee.. Cos 2x has three different things it could equal to :) http://prntscr.com/7j2qax

  11. anonymous
    • one year ago
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    Great! Thank you for the help!

  12. butterflydreamer
    • one year ago
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    no problemoooo~

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spraguer (Moderator)
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