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rdcook89

  • 3 years ago

How do we know that cos(n*pi) = (-1)^n and what is sin(n*pi) equal to?

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  1. tjones89
    • 3 years ago
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    |dw:1350371146011:dw|

  2. tjones89
    • 3 years ago
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    when n is even the cosine function is at positive 1, likewise when n is even -1^n is also positive 1

  3. tjones89
    • 3 years ago
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    |dw:1350371601199:dw|

  4. tjones89
    • 3 years ago
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    the sine(n pi) function is zero for any integer n

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