作业帮matlab中 simple函数
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matlab中 simple函数
为什么将y化简会出错
为什么将y化简会出错
我运行没问题呀,可能是精简版功能不齐全,要不你试试加上syms x
>> y=sym('2*sin(x)*cos(x)');
>> y
y =
2*cos(x)*sin(x)
>> simple(y)
simplify:
sin(2*x)
radsimp:
2*cos(x)*sin(x)
simplify(100):
sin(2*x)
combine(sincos):
sin(2*x)
combine(sinhcosh):
2*cos(x)*sin(x)
combine(ln):
2*cos(x)*sin(x)
factor:
2*cos(x)*sin(x)
expand:
2*cos(x)*sin(x)
combine:
2*cos(x)*sin(x)
rewrite(exp):
2*((1/exp(x*i))/2 + exp(x*i)/2)*(((1/exp(x*i))*i)/2 - (exp(x*i)*i)/2)
rewrite(sincos):
2*cos(x)*sin(x)
rewrite(sinhcosh):
2*cosh(-x*i)*sinh(-x*i)*i
rewrite(tan):
-(4*tan(x/2)*(tan(x/2)^2 - 1))/(tan(x/2)^2 + 1)^2
mwcos2sin:
-2*sin(x)*(2*sin(x/2)^2 - 1)
collect(x):
2*cos(x)*sin(x)
ans =
sin(2*x)
>> y=sym('2*sin(x)*cos(x)');
>> y
y =
2*cos(x)*sin(x)
>> simple(y)
simplify:
sin(2*x)
radsimp:
2*cos(x)*sin(x)
simplify(100):
sin(2*x)
combine(sincos):
sin(2*x)
combine(sinhcosh):
2*cos(x)*sin(x)
combine(ln):
2*cos(x)*sin(x)
factor:
2*cos(x)*sin(x)
expand:
2*cos(x)*sin(x)
combine:
2*cos(x)*sin(x)
rewrite(exp):
2*((1/exp(x*i))/2 + exp(x*i)/2)*(((1/exp(x*i))*i)/2 - (exp(x*i)*i)/2)
rewrite(sincos):
2*cos(x)*sin(x)
rewrite(sinhcosh):
2*cosh(-x*i)*sinh(-x*i)*i
rewrite(tan):
-(4*tan(x/2)*(tan(x/2)^2 - 1))/(tan(x/2)^2 + 1)^2
mwcos2sin:
-2*sin(x)*(2*sin(x/2)^2 - 1)
collect(x):
2*cos(x)*sin(x)
ans =
sin(2*x)