求證：arctan1/2+arctan1/3=180/4 {arc是反三角，180是pa ai }
熱心網(wǎng)友
a=arctan(1/2);b=arctan(1/3)---tana=1/2;tanb=1/3.(00a+b=Pi/4---arctan(1/2)+arctan(1/3)=Pi/4
求證：arctan1/2+arctan1/3=180/4 {arc是反三角，180是pa ai }
a=arctan(1/2);b=arctan(1/3)---tana=1/2;tanb=1/3.(00a+b=Pi/4---arctan(1/2)+arctan(1/3)=Pi/4