UID :40699
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chaofan:( ) parentheses+,-,*,/ add, subtract, multiply, divideSqr() square root ~-k,$J?7 ....... (2009-12-25 11:17) C~T,[U
yxy0728:好像是有的,你试一试acos或者arccos,没有用过,听别人说过 (2009-12-25 10:18) <gi~:%T