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Time constant = R C C = time constant/R R = time constant/C When used as a filter, Cutoff frequency = 1 / (2 pi) R C R = 1 / (2 pi) (cutoff frequency) ( C ) C = 1 / (2 pi) (cutoff frequency) ( R )
Pi can be used to calculate the area of a circle Pi can be used to calculate the circumference of a circle
Pi = circumference/diameter
No. Pi is a finite number.
The first person to calculate pi was Archimedes, around 250 B.C. Using the formula:A = pi r^2