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Math Help - needing some help please...

  1. #1
    ck3
    ck3 is offline
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    Question needing some help please...

    just few questions..im just checking my work if i arrived with the right answer.

    1.equivalent expression to (1 + tan x)/sec x?

    2. the exact value of csc (4pie/3)?

    3. the phase shift of the function defined by the expression y= 4 sin(2Ө-6)?

    4. the amplitude of the function defined by the expression y= 4 sin [2pie/5(t-9)]?


    thank you so much...i was just having problem solving this question...i appreciate all your help.....
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by ck3 View Post
    just few questions..im just checking my work if i arrived with the right answer.

    1.equivalent expression to (1 + tan x)/sec x?

    2. the exact value of csc (4pie/3)?

    3. the phase shift of the function defined by the expression y= 4 sin(2Ө-6)?

    4. the amplitude of the function defined by the expression y= 4 sin [2pie/5(t-9)]?


    thank you so much...i was just having problem solving this question...i appreciate all your help.....
    It's "pi" not pie!

    1. There are any number of equivalent expressions to (1+tanx)/secx. One would be:
    sin(x) + cos(x), where cos(x) \neq 0

    2. csc(4 \pi/3) = \frac{1}{sin(4 \pi/3)} = \frac{1}{-sin(\pi/3)} = - \frac{1}{\frac{\sqrt{3}}{2}} = -\frac{2}{\sqrt{3}}

    3 and 4. y(x) = A sin(kx - \phi)
    where A is the amplitude, k is the wavenumber, and \phi is the phase shift.

    -Dan
    Last edited by topsquark; November 12th 2006 at 06:29 AM. Reason: Wrong Greek letter
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