α为锐角,且满足sinα=3cosα,则sinαcosα=

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α为锐角,且满足sinα=3cosα,则sinαcosα=α为锐角,且满足sinα=3cosα,则sinαcosα=α为锐角,且满足sinα=3cosα,则sinαcosα=sinα=3cosα则ta

α为锐角,且满足sinα=3cosα,则sinαcosα=
α为锐角,且满足sinα=3cosα,则sinαcosα=

α为锐角,且满足sinα=3cosα,则sinαcosα=
sinα=3cosα

tana=3

sinαcosα
=sinαcosα/(sin²a+cos²a)
=tana/(tan²a+1)
=3/(9+1)
=3/10