(4sina-2cosa)/(5cosa+3sina)=6/11.则tana

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(4sina-2cosa)/(5cosa+3sina)=6/11.则tana(4sina-2cosa)/(5cosa+3sina)=6/11.则tana(4sina-2cosa)/(5cosa+3si

(4sina-2cosa)/(5cosa+3sina)=6/11.则tana
(4sina-2cosa)/(5cosa+3sina)=6/11.则tana

(4sina-2cosa)/(5cosa+3sina)=6/11.则tana
(4sina-2cosa)/(5cosa+3sina)=6/11
11(4sina-2cosa)=6(5cosa+3sina)
44sina-22cosa=30cosa+18sina
sinθ=2cosθ
tana=sina/cosa=2