The famous mathematical problems featuring pi include finding the area and the circumference of a circle. The value for pi is 3.14.
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To convert from radians to degrees, multiply by 180° and divide by pi.
If you mean y = Sin(pi(x)) Then Use the chain rule dy/dx = dy/du X du/dx Let pi(x) = u y = Sin (u) dy/du = Cos(u) u = pi(x) du/dx = pi Combining dy/dx = pi Cos(u) = piCos (pi(x)). The answer!!!!!
Assuming the '12 inch' is the radius. Then C = 2 pi r C = 2 pi 12 C = 24 pi ( Thr asnswer in terms of 'pi').
For 0 < x < pi. sin(x) is positive,for pi < x < 2*pi, sin(x) is negative and these intervals can be left or right-shifted by any multiple of 2*pi radians.
It is 0.2048*PI radians, approx.