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If cos 2B =(cos (A+C))/(cos (A-C)) then ...

If `cos 2B =(cos (A+C))/(cos (A-C))` then `tann A,tan B,tanC` are in

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Knowledge Check

  • If cos 2B=(cos (A+C))/(cos(A-C)) , then tan A , tan B , tan C are in

    A
    A.P.
    B
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    C
    H.P.
    D
    none

  • If cos 2B=(cos(A+C))/(cos(A-C)) , then tan A, tan B, tan C are in

    A
    A.P.
    B
    G.P.
    C
    H.P.
    D
    A.G.P.

  • (c- b cos A )/( b - c cos A ) =

    A
    `(cos C ) /( cos B) `
    B
    ` ( cos B) /( cos C) `
    C
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    D
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