Evaluate
\frac{5\pi }{16}\approx 0.981747704
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\frac{5\pi }{8\times 2}
Multiply \frac{5\pi }{8} times \frac{1}{2} by multiplying numerator times numerator and denominator times denominator.
\frac{5\pi }{16}
Multiply 8 and 2 to get 16.
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