as4tep7honskyDeszz as4tep7honskyDeszz
  • 24-11-2016
  • Mathematics
contestada

Determine the sign of cos pi/3 without using a calculator.

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nobillionaireNobley
nobillionaireNobley nobillionaireNobley
  • 26-11-2016
pi/3 is in the first quadrant, and all trigonometric functions are positive in the first quadrant,
Therefore, cos pi/3 is positive.

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