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If A=cos^2theta+s in^4theta, prove that ...

If `A=cos^2theta+s in^4theta,` prove that `3/4lt=1` for all values of `thetadot`

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Knowledge Check

  • If A=sin^(2)theta+cos^(4)theta , then for all real values of theta :

    A
    `3/4 le A le 13/16`
    B
    `3/4 le A le 1`
    C
    `1 leAle2`
    D
    `13/16 le Ale1`

  • If A=sin^(2) theta+cos^(4) theta , then for all values of theta

    A
    ` 1 le A le 2`
    B
    `3//4 le A le 1`
    C
    `13//16 le A le 1`
    D
    `3//4 le A le 13//16`

  • If A= cos^(4)theta+sin^(2)theta , then for all values of theta :

    A
    `1 lt A le2`
    B
    `(13)/(16) le A le 1`
    C
    `(3)/(4) le A le (13)/(16)`
    D
    `(3)/(4) le A le 1`

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    Prove that: -4le5costheta+3cos(theta+(pi)/(3))+3le10 , for all values of theta ,

    If cos^(4)theta-sin^(4)theta=(2)/(3) , then the value of 2cos^(2)theta-1 is

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