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anonymous

  • 5 years ago

cos2theta + 2cos^2theta=2

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  1. anonymous
    • 5 years ago
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    kno any thing about square root

  2. myininaya
    • 5 years ago
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    so we have 3cos^2theta=2

  3. myininaya
    • 5 years ago
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    cos^2thetha=2/3

  4. myininaya
    • 5 years ago
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    take the square root of both sides costheta=2/3 and costhetha=-2/3

  5. myininaya
    • 5 years ago
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    thetha=arccos(2/3) and thetha=arcsos(-2/3)

  6. anonymous
    • 5 years ago
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    how did you get 3cos^2theta=2 if they aren't like terms so you can't combine them

  7. myininaya
    • 5 years ago
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    oh I thought they were both raised to the second power my bad

  8. myininaya
    • 5 years ago
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    i misread it

  9. anonymous
    • 5 years ago
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    oh ok but do you understand it?

  10. myininaya
    • 5 years ago
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    yes

  11. myininaya
    • 5 years ago
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    give me just a sec

  12. myininaya
    • 5 years ago
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    scanning right now

  13. myininaya
    • 5 years ago
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  14. anonymous
    • 5 years ago
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    thanks

  15. myininaya
    • 5 years ago
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    so it looks good?

  16. anonymous
    • 5 years ago
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    yea, i got the same answer before doing it a different longer complex way but its good.

  17. myininaya
    • 5 years ago
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    k

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