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(cos 3theta+ 2 cos 5theta+ cos 7theta)/(...

`(cos 3theta+ 2 cos 5theta+ cos 7theta)/( cos theta+ 2 cos 3theta+ cos 5theta)= cos 2theta- sin 2theta tan 3theta`.

Answer

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What is the value of [(cos 3 theta + 2cos 5 theta+ cos 7 theta)/(cos theta + 2cos 3 theta + cos 5 theta)] + sin 2 theta tan 3 theta ? [(cos 3 theta + 2cos 5 theta+ cos 7 theta)/(cos theta + 2cos 3 theta + cos 5 theta)] + sin 2 theta tan 3 theta का मान क्या है?

Prove that (cos3 theta+2cos5 theta+cos7 theta)/(cos theta+2cos3 theta+cos5 theta)=cos2 theta-sin2 theta tan3 theta

Knowledge Check

  • If cos 2theta + cos 8theta = cos 5theta then theta =

    A
    `(2n+1)(pi)/(4) : n in Z` or `2n pi pm (2pi)/(3) : n in Z`
    B
    `(n pi)/(4) : n in Z` or `n pi pm (pi)/(6) : n in Z`
    C
    `n pi : n in Z` or `(2n+1)(pi)/(9) : n in Z`
    D
    `(2n + 1) (pi)/(10) : n in Z` or `(2n pi)/(3) pm (pi)/(9) : n in Z`

  • If cos theta + cos 7theta + cos 3theta + cos 5 theta =0, then theta is

    A
    `(npi)/(4)`
    B
    `(npi)/(2)`
    C
    `(npi)/(8)`
    D
    None of these

  • If cos theta + cos 7theta + cos 3 theta + cos 5theta = 0 , then theta =

    A
    `n pi`
    B
    `n pi //2`
    C
    `n pi //4`
    D
    `n pi //8`

    • Similar Questions

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    cos 3theta+cos 5theta+cos 7theta+cos 9theta=4 cos theta cos 2theta cos 6theta .

    Prove that (sin theta + sin 3theta+ sin 5 theta + sin 7theta)/(cos theta + cos 3theta + cos 5 theta + cos 7theta) = (tan 3theta + tan theta)/(1 - tan 3theta tan theta) .

    If cos theta + cos 7theta + cos 3theta + cos 5 theta =0, then theta is

    If cos theta + cos 2theta + cos 3theta = 0 then theta =

    2 cos theta - cos 3 theta - cos 5 theta - 16 cos^(3) theta sin^(2) theta =

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