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这是什么原因啊？急求！。
方程两边用两个等号连接而不是一个,此外cosd(a)cosd(c)这种写法也不行,如果是乘积就老老实实写成cosd(a)*cosd(c) 然后,solve函数调用格式怕是有问题,doc solve参考示例,比较新的版本的写法都是 [a,b,c,d,e,...
3 years ago | 0
| accepted
