<PRE><B>Question 695548</B>
How do I find the opposite sine of -pi divided by 3 without using a calculator or the opposite sine of the positive sine of 2pi divided by 3?
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find the opposite sine of -pi divided by 3 without using a calculator
sin(-pi/3) = -sin(pi/3) = -sin(60 degrees) = -1/sqrt(3)
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sin((2/3)pi) = sin(120 degrees) = sin(30) = 1/2
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Cheers,
Stan H.
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