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ksaimouli

  • 5 years ago

3cosx+9=7 slove for x saifoooo help

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  1. ksaimouli
    • 5 years ago
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    131.8 another one

  2. ksaimouli
    • 5 years ago
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    plx 73 plz

  3. anonymous
    • 5 years ago
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    \[\color{red}{x}\color{blue}{\text{saifoo}}=\cos^{-1}(-\frac{2}{3})\]

  4. myininaya
    • 5 years ago
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    I told you how to get the solutions \[x=\cos^{-1}(\frac{-2}{3})+2n \pi\] Please ask me what you don't understand about how I got this? by the way n is an integer

  5. anonymous
    • 5 years ago
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    looks like 131.8 degrees if you are working in degrees

  6. anonymous
    • 5 years ago
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    hello myininaya!

  7. myininaya
    • 5 years ago
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    if you want degrees do +360 n

  8. myininaya
    • 5 years ago
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    and put your calc in degree mode for approximations

  9. myininaya
    • 5 years ago
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    hey sat

  10. ksaimouli
    • 5 years ago
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    how to get 228.19

  11. anonymous
    • 5 years ago
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    i am making truth tables. nothing could be more boring, but i have to do it t t t f f t f f arrghhh

  12. ksaimouli
    • 5 years ago
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    is i have to add 180 hhhhhhhhhh i dont know plz help

  13. anonymous
    • 5 years ago
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    subtract 131.8 from 360

  14. anonymous
    • 5 years ago
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    let me draw a picture

  15. ksaimouli
    • 5 years ago
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    ok

  16. anonymous
    • 5 years ago
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    |dw:1326938616923:dw|

  17. myininaya
    • 5 years ago
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    cos(x)=cos(-x)

  18. anonymous
    • 5 years ago
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    both those places on the circle have the same first coordinate, that is the same cosine. the first one you can get from the calculator, it is131.8 the other one you get from subtracting 131.8 from 360

  19. myininaya
    • 5 years ago
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    \[\cos(131.8)=\cos(-131.8)=\cos(-131.8+360)\]

  20. anonymous
    • 5 years ago
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    @myininaya is that a five o-clock shadow you're sporting?

  21. ksaimouli
    • 5 years ago
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    ok thx so ican sub 360 for everythink like thses problems

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