arcsin(sin4)=?? 麻煩寫一下過程
arcsinx=x.當僅當-1=熱心網友arcsin(sin4)=π-4 因為函數arcsinX的值域在[-π/2,π/2].過程:arcsin(sin4)=arcsin(sin(π-4))-π/2<=π-4<=π/2.
arcsin(sin4)=π-4 因為函數arcsinX的值域在[-π/2,π/2].過程:arcsin(sin4)=arcsin(sin(π-4))-π/2<=π-4<=π/2.
