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Find the value of cos48^(@)-sin42^(@)....

Find the value of `cos48^(@)-sin42^(@)`.

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Find the value of cos42^(@)-sin48^(@) .

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Knowledge Check

  • Find the value of cos28^(@).cos32^(@)-sin28^(@).sin32^(@) :

    A
    1
    B
    `1/2`
    C
    `1/3`
    D
    can't be determined

  • The value of cos^(2)48^(@)-sin^(2)12^(@) is

    A
    `(sqrt(5)+1)/(8)`
    B
    `(sqrt(5)-1)/(8)`
    C
    `(sqrt(5)+1)/(5)`
    D
    `(sqrt(5)+1)/(2sqrt(2))`

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    Find the value of sin 48^(@) sec 42^(@)+cos48^(@) "cosec"42^(@).

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