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anonymous

  • one year ago

FAN AND MEDAL For what x-value(s) does cos(x) = -1? -270°, -90°, 90°, and 270° -270°, -90°, 0°, 90°, and 270° -180° and 180° -360°, 0° and 360°

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  1. xapproachesinfinity
    • one year ago
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    somebody else had this same problem look for it

  2. Vocaloid
    • one year ago
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    http://openstudy.com/study#/updates/55831bfee4b0b31a8a3fee1a if there's anything that's still confusing, feel free to tag me

  3. anonymous
    • one year ago
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    that is not the same question nor the same equation ??

  4. Vocaloid
    • one year ago
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    well, not exactly, but after he simplified he ended up with cos(x) = -1, which is the same as your problem look at the later parts of the question

  5. MrNood
    • one year ago
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    Or better still have a look at the graph of cos (x) from -360 to 360 and see where it is -1 Try to understand the cyclic nature of the cos function...

  6. MrNood
    • one year ago
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    |dw:1434657189058:dw|

  7. anonymous
    • one year ago
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    oh ok thanks .....

  8. anonymous
    • one year ago
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    it was -180 and 180

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