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Math Help - exact value of a trig function

  1. #1
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    Exclamation exact value of a trig function

    find the exact value of the trig function. sin A = 2/7 cos B = -5/7

    (pi/2) is less than or equal to A which is less than pi.

    and

    (pi) is less than or equal to B which is less than or equal to (3pi/2)
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  2. #2
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    More information please

    Hello jumpman23
    Quote Originally Posted by jumpman23 View Post
    find the exact value of the trig function. sin A = 2/7 cos B = -5/7

    (pi/2) is less than or equal to A which is less than pi.

    and

    (pi) is less than or equal to B which is less than or equal to (3pi/2)
    What trig function? The question doesn't make sense!

    Grandad
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