cos2x/(sinx-cosx)=1/5,则tanx+cotx=?
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cos2x/(sinx-cosx)=1/5,则tanx+cotx=?
cos2x/(sinx-cosx)=1/5,则tanx+cotx=?
cos2x/(sinx-cosx)=1/5,则tanx+cotx=?
cos2x/(sinx-cosx) =(cos^2x-sin^2x)/(sinx-cosx) =-(cosx+sinx) =1/5 (cosx+sinx)^2=1/25 2sinxcosx=-24/25 sinxcosx=-12/25 tanx+cotx=sinx/cosx +cosx/sinx =1/(sinxcosx) =-25/12
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cos2x/(sinx-cosx)=1/5,则tanx+cotx=?
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