tan(A+B)=3,tan(A-B)=5,求tan2A,tan2B.(A,B是角)

tan(A+B)=3,tan(A-B)=5,求tan2A,tan2B.(A,B是角) tan(a+b)=3 tan(a-b)=5 求tan2a tan2b的值 tan(a+b)=3,tan(a-b)=5,求tan2a和tan2b的值 已知tan(a+b)=3,tan(a-b)=5,求tan2a,tan2b的值~ tan(a+b)=5,tan(a-b)=3求tan2a,tan2b的值? 已知tan(a+b)=3,tan(a-b)=5,求tan2a,tan2b的值.辛苦 已知tan(a-b)=1/3,tan(a+b)=1/2,求tan2a,tan2b的值 tan(a+b)=2/5,tan(a-b)=1/4,求tana,tanb,tan2a 已知tan（a+b）=3,tan（a-b）=5 试求：tan2a和tan2 b的值 tan A:tan B:tan C=1:2:3 求A:B:C tan(a-3/π) =2 tan(3/π-B)=2/5 求tan（a+b）= a,b为两个角.已知tan(a-b/2)=1/2 ,tan(b-a/2)=-1/3,求tan(a+b)=?