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    #1
    $\tiny{\\ eb 4.d}$
    $\textsf{If $v_x=-9.80$ units and $v_y=-6.40$ units,}\\$
    $\textit{determine the magnitude and direction of $V$.}$
    \begin{align*}\displaystyle
    magnitude&=\sqrt{(-9.8)^2+(-6.4)^2}
    =\color{red}{11.7047}\\
    direction&=\arctan{\left[\frac{6.4}{-9.8}\right]}
    =\color{red}{33.15^o}
    \end{align*}

    ok the direction is actually in the Q4 but $\arctan{\left[\frac{-6.4}{-9.8}\right]}$
    is in Q1! Do we just add $180^o$ for that or is it $-33.15^o$

    Also is there symbols for magnitude and direction other than an arrow on the graph

    Also where is the latex for degree instead of ^o

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    #2
    Quote Originally Posted by karush View Post
    $\tiny{\\ eb 4.d}$
    $\textsf{If $v_x=-9.80$ units and $v_y=-6.40$ units,}\\$
    $\textit{determine the magnitude and direction of $V$.}$
    \begin{align*}\displaystyle
    magnitude&=\sqrt{(-9.8)^2+(-6.4)^2}
    =\color{red}{11.7047}\\
    direction&=\arctan{\left[\frac{6.4}{-9.8}\right]}
    =\color{red}{33.15^o}
    \end{align*}

    ok the direction is actually in the Q4 but $\arctan{\left[\frac{-6.4}{-9.8}\right]}$
    is in Q1! Do we just add $180^o$ for that or is it $-33.15^o$
    The direction would be in quadrant III, and so recognizing that both components are negative, you would in fact add $\pi$ to the angle:

    $ \displaystyle \theta=\pi+\arctan\left(\frac{v_y}{v_x}\right)$

    Quote Originally Posted by karush View Post
    Also is there symbols for magnitude and direction other than an arrow on the graph

    Also where is the latex for degree instead of ^o
    I use ^{\circ} for the degree symbol.

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    #3 Thread Author
    Quote Originally Posted by MarkFL View Post
    The direction would be in quadrant III, and so recognizing that both components are negative, you would in fact add $\pi$ to the angle:

    $ \displaystyle \theta=\pi+\arctan\left(\frac{v_y}{v_x}\right)$
    $\textsf{ok so it}$ $ \displaystyle 33.15^\circ + 180^\circ = 213.15^\circ $
    that would place it Q3

    Quote Originally Posted by MarkFL View Post
    I use ^{\circ} for the degree symbol.
    actually why don't we have \degree on the Symbol/Command Set:

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    #4
    It was an oversight I suppose, but adding it now would require a lot of effort.

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    #5 Thread Author
    I completely understand

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