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Math Help - Hi!

  1. #1
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    Hi!

    my work is attached below! thanks
    Attached Files Attached Files
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by honey View Post
    my work is attached below! thanks
    As I'm working from my apartment, can I just take this opportunity to say
    "Hi honey, I'm home!"
    (Apologies.)

    Any way...

    1A and 1B are correct. Though I must say that it is quicker to use the equivalent equation: s = r \theta where s is the arc length, r is the radius, and \theta is the angle is radians.

    2. Your answer here is correct for the positive answer. Now you need a negative version.

    3. sin(-145\pi/3) = -sin(145\pi/3) = -sin(145\pi/3 - 24(2\pi)) <-- This step is to reduce the angle to something easier to work with.

    sin(-145\pi/3) = -sin(\pi/3) = -\sqrt{3}/2

    -Dan
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