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Math Help - Trigonometric problem

  1. #1
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    Trigonometric problem

    Hi, I couldnt solve to this question may you help me?


    IF y = 5cos(x) + 3 then what is the heap of this equation?


    (a) All real numbers
    (b) alpha<= y <= alpha
    (c) -2 <= y <= 10
    (d) -2 <= y <= 8

    Thank you
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  2. #2
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    Re: Trigonometric problem

    Quote Originally Posted by sunrise View Post
    Hi,
    IF y = 5cos(x) + 3 then what is the heap of this equation?
    (a) All real numbers
    (b) alpha<= y <= alpha
    (c) -2 <= y <= 10
    (d) -2 <= y <= 8
    What does "the heap" mean?
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  3. #3
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    Re: Trigonometric problem

    pardon it did wrong
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  4. #4
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    Re: Trigonometric problem

    From your "candidate" answers, I suspect that "heap" is a mistranslation and that you are asking for the "range" of f(x)= 5 cos(x)+ 3. Since the range of cos(x) itself is -1 to 1, 5 cos(x)+ 3 can be any number from -5+ 3= -2 to 5+ 3= 8.

    (If, in fact, you meant "domain", that is, of course, all real numbers.)
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  5. #5
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    Re: Trigonometric problem

    Thank you very much
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