admin百科知識 2022-02-13 18:15:32 已知3sinb=sin(2a+b)且tana=1,求tan(a+b).已知3sinb=sin(2a b)且tana=1,求tan(a b).網友廻答：匿名網友3*sin(a b-a)=sin(a b a);3*sin(a b)cos(a)-3*cos(a b)sin(a)=sin(a b)cos(a) cos(a b)sin(a);2*sin(a b)cos(a)=4cos(a b)sin(a);tan(a b)=2*tin(a)=2 db標簽 生活常識_百科知識_各類知識大全»已知3sinb=sin(2a+b)且tana=1,求tan(a+b).
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