首先来个简单
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4 U4 {; G7 d# s* Z) Z) M6 T>> syms t r a b q
0 w2 @4 i, `& k/ i, Y3 H- Y/ Y. @9 `2 }>> x=r*cos(t)+a;
% w# z; e' B6 K8 ~$ F% l>> y=r*sin(t)+b;; v5 @$ O9 w" ]+ x1 G+ n
>> X=-x*cos(q)-y*sin(q);- }& h7 s* \, H6 _
>> simplify(X)
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8 d" V" B& B+ f; Q; q1 e) p; Tans =# L4 E& A/ e" J& e$ q; B
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- a*cos(q) - b*sin(q) - r*cos(q - t)
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复杂点 就不化简了
. C/ C4 N5 u* Z c4 `: Z >> syms t r a b k q A% \9 D2 h7 f7 F$ A8 s
>> x=r*cos(t)+a;
: P+ w, y6 W# Q# G( D" X* y5 i>> y=r*sin(t)+b;. M8 N# t! G5 c; ^' e
>> N=[-cos(k*q) -sin(k*q) cos(q);-sin(k*q) cos(k*q) sin(q)];; X* V6 A5 i/ F8 f1 R$ Y7 p
>> M=[x;y;A];% @& m6 Q2 y8 c# n4 j C) U
>> NM=N*M
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NM =
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1 i8 l3 j, Y% n4 P1 g! n A*cos(q) - cos(k*q)*(a + r*cos(t)) - sin(k*q)*(b + r*sin(t))$ r5 L1 T7 S. N- X- `2 I/ C
cos(k*q)*(b + r*sin(t)) - sin(k*q)*(a + r*cos(t)) + A*sin(q)! v- n6 A5 b [, l5 C4 Y: ~, O
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>> x1=A*cos(q) - cos(k*q)*(a + r*cos(t)) - sin(k*q)*(b + r*sin(t));3 i. ?+ m7 A S, c/ R
>> simplify(x1)
a7 i, C E3 Y: I
% J0 b& T8 j1 _! Tans =1 Q: T8 }; {$ h+ u6 m/ [) ]7 q& J
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A*cos(q) - cos(k*q)*(a + r*cos(t)) - sin(k*q)*(b + r*sin(t)) 化简无效果 按正常应该是
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A*cos(q) - a*cos(k*q) - b*sin(k*q)-r*cos(k*q-t)
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>> y1=cos(k*q)*(b + r*sin(t)) - sin(k*q)*(a + r*cos(t)) + A*sin(q);
) [/ ^( ^/ h R9 C>> simplify(y1)2 @0 T7 @* k/ k9 o* y9 B
, N# L( E [; M% \& ?ans =
( \* C2 g* q$ q, e: x7 p 7 \" G! s& O4 y; v9 H3 w
cos(k*q)*(b + r*sin(t)) - sin(k*q)*(a + r*cos(t)) + A*sin(q)
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