arctan计算公式
arctan函数是反正切函数,其计算公式为:
arctan(x) = tan^-1(x) = y
其中,x是正切值,y是角度值,满足以下条件:
- x属于[-∞,+∞]
- y属于[-π/2,+π/2]
例如:
- arctan(1) = tan^-1(1) = π/4
- arctan(0) = tan^-1(0) = 0
- arctan(-1) = tan^-1(-1) = -π/4
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