If cosx=45,cscx<0,\displaystyle {\cos{{x}}}=\frac{{4}}{{5}},{\csc{{x}}}<{0}, then
sin2x=\displaystyle {\sin{{2}}}{x}=   ;
cos2x=\displaystyle {\cos{{2}}}{x}=   ;
tan2x=\displaystyle {\tan{{2}}}{x}=   .