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Calculated Cos (pi/2) with my graphing calculator, it says -5.10338076868E^-12 instead of 0, why? - Quora
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SOLVED: Find the exact value of the trigonometric expression without the use of a calculator. sin(pi/12) cos(7pi/12) + cos(pi/12) sin(7pi/12) =
Calculated Cos (pi/2) with my graphing calculator, it says -5.10338076868E^-12 instead of 0, why? - Quora
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