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sweetcandy01

how do you solve cos(2pi)? thanks in advance

  • 10 months ago
  • 10 months ago

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  1. KirbyLegs
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    Well there is a couple of ways to go about this problem. You could graph it or you could get an exact number. Try putting cos(2pi) into your calculator to get a decimal answer.

    • 10 months ago
  2. phi
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    with a calculator, but people memorize the sin, cos and tan of "special" angles 2 pi is a special angle.

    • 10 months ago
  3. shivamgautam
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    its 1

    • 10 months ago
  4. sweetcandy01
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    thanks for the responses! i thought there was a way to solve it by hand.. i'll just memorize it then!

    • 10 months ago
  5. AravindG
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    Think graphically |dw:1371404215303:dw|

    • 10 months ago
  6. AravindG
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    It comes back to 0 So its equivalent to cos 0

    • 10 months ago
  7. KirbyLegs
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    Well in a unit circle yes. Is that what the problem is asking for? Cosine is in the fourth quadrant, it is always positive in there. The coordinates of 2pi are on 0 degrees

    • 10 months ago
  8. anuupkc27
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    cos2pi =cos360 =cos(90*4+0) = cos0 =1

    • 10 months ago
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