The value of Pi is 3.14 so the value of Pi by 2 is 6.28.
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The value for Pi for math is 3.14. Pi is the 16th letter in the Greek alphabet.
sin(theta) reach a maximum at pi / 2 + all even multiple of 2 pi. As a result, the smallest positive value of x where y = sin(2x) is maximal is pi / 2.
sin(3π/2) = -1
10
Archimedes estimated the correct value of pi