Arctangent

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Arctangent

	Arcsine Y	arcsin(x) x = Sin (y) -1 to +1 -π/2 <u><</u> y <u><</u> π/2
	Arccosine Y	arccos(x) x = Cos (y) -1 to +1 0 <u><</u> y <u><</u> π
	Arctangent Y	arctan(x) x = Tan (y) all -π/2 < y < π/2
	Arccosecant Y	arccsc(x) x = Cosec (y), y = arcsin(1/x)
	Arcsecant Y	arcsec(x) x = Sec (y), y = arccos(1/x)
	Arccotangent Y	arccot(x)x = Cot (y), y = arctan(1/x) all