a,b为锐角(1+sina-cosa)/sina * (1+sinb-cosb) /sinb=2,求tana*tanb

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a,b为锐角(1+sina-cosa)/sina*(1+sinb-cosb)/sinb=2,求tana*tanba,b为锐角(1+sina-cosa)/sina*(1+sinb-cosb)/sinb=

a,b为锐角(1+sina-cosa)/sina * (1+sinb-cosb) /sinb=2,求tana*tanb
a,b为锐角(1+sina-cosa)/sina * (1+sinb-cosb) /sinb=2,求tana*tanb

a,b为锐角(1+sina-cosa)/sina * (1+sinb-cosb) /sinb=2,求tana*tanb
tana*tanb=1