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Sagot :
a) domain -1 to 1.
Range -pi/2 to pi/2 radians or -90 to 90 degree.
b) domain -1 to 1.
Range 0 to pi radians or 0 to 180 degrees.
c) domain is all real numbers.
Range -pi/2 to pi/2 radians or -90 to 90 degree.
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