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anonymous

  • one year ago

Thanks for helping! I simplified a pre calc problem into cos(x)=1/sqrt(2) From here I'm stuck, as I need to write it in terms of pi. I would really appreciate any help, thanks!

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  1. anonymous
    • one year ago
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    @Hero @iambatman @Kainui @jim_thompson5910 @ganeshie8 @zepdrix @Nnesha

  2. anonymous
    • one year ago
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    Which value of x makes \(cos(x) = \frac{1}{\sqrt{2}} = \frac{\sqrt{2}}{2}\) ?

  3. anonymous
    • one year ago
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    remember the basic cos, sin and tan of 30, 45 and 60 deg?

  4. Nnesha
    • one year ago
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    you can't hve the radical sign at the bottom so multiply top and bottom both with square root 2

  5. anonymous
    • one year ago
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    yea

  6. jim_thompson5910
    • one year ago
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    this unit circle may help http://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Unit_circle_angles_color.svg/1024px-Unit_circle_angles_color.svg.png

  7. anonymous
    • one year ago
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    oh, wait, I remember this now. Thanks for the help guys!

  8. anonymous
    • one year ago
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    No problem ^^

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