题目内容
已知sin(45°+α)=
,则sin(225°+α)=_________________.
解析:sin(225°+α)=sin［(45°+α)+180°］=-sin(45°+α)=-.
答案:-
练习册系列答案
心算口算巧算一课一练系列答案
相关题目
,则sin(225°+α)=_________________.心算口算巧算一课一练系列答案题目内容
已知sin(45°+α)=,则sin(225°+α)=_________________.
解析:sin(225°+α)=sin［(45°+α)+180°］=-sin(45°+α)=-.
答案:-
心算口算巧算一课一练系列答案