(cos(3x+π/4)-sin(3x+π/4))/(cos(3x+π/4)+sin(3x+π/4))的值域 定义域 最小正周期
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(cos(3x+π/4)-sin(3x+π/4))/(cos(3x+π/4)+sin(3x+π/4))的值域 定义域 最小正周期
(cos(3x+π/4)-sin(3x+π/4))/(cos(3x+π/4)+sin(3x+π/4))的值域 定义域 最小正周期
(cos(3x+π/4)-sin(3x+π/4))/(cos(3x+π/4)+sin(3x+π/4))的值域 定义域 最小正周期
首先将分子单角单函,化为:根号2*sin(派/4-(3x+派/4))=-根号2*sin(3x).再将分母单角单函,化为:根号2*sin((3x+派/4)+派/4)=根号2*cos(3x).所以比值为:-tan(3x).所以值域为:R,最小正周期为:派/3,定义域为:3x不等于(k派+派/2),即x不等于(k派/3+派/6)(k€N).
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