8 s( c, t: H3 M9 U. J, n-Plot::plnr : ) q+ X3 z* L& q+ N( J0 v& u tan[x] is not a machine-size real , U# c3 {# ^ i8 S
number at x =-0.785398. |. x0 r8 _- m
-Plot::plnr :( u0 z& k8 e* U1 e1 v1 N
tan[x] is not a machine-size real ' J6 R7 U' c" i( Z9 ` number at x =-0.721676 ( g3 S% h; K% n' a9 I9 V-Plot::plnr :/ S5 _/ b: n, |
tan[x] is not a machine-size real 4 p N0 G' |$ H2 F: ? number at x =-0.6521812 Z$ T' {& i b6 h4 @1 @# d
-General::stop : ; e" V6 R7 \1 E; V5 Y- d Further output of Plot::plnr will: h/ D) P: Y' J; d5 z
be suppressed during% F9 w4 V1 f9 t/ E5 k% W9 q
this calculation. ! C+ @) N- k1 j8 {4 G4 v' X6 Y; [然后出现坐标系,什么都没有,有没有人能解释一下,或告诉我该怎么画 # P' f' g; ~2 @+ _/ v% Q* K因为tan[x]这样的函数肯定有无穷大的值,如果这么说的话是不是mathematics画不了这类函数?