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Thread: how to solve equation with two unknowns

  1. #1
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    how to solve equation with two unknowns

    how to solve equation with two unknowns-hard-question.png

    please can someone explain to me how i can solve the above equation?
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  2. #2
    Junior Member Cervesa's Avatar
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    Re: how to solve equation with two unknowns



    (a) substitute $24^\circ$ for $\theta$ and calculate the current $i$ with your calculator in degree mode.

    (b) use a graphing utility to plot $y = 0.735 \sqrt{\dfrac{x}{\sin(x+30^\circ)}}$ and $y = 3$. determine the intersection of the two graphs.
    Attached Thumbnails Attached Thumbnails how to solve equation with two unknowns-evaluate_formula.png   how to solve equation with two unknowns-graph_formula.png   how to solve equation with two unknowns-intersection.png  
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  3. #3
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    Re: how to solve equation with two unknowns

    thank you Cervesa, that is very helpful. Please could you tell me what graphing software you have used in the above example or is that a calculator?
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  4. #4
    Junior Member Cervesa's Avatar
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    Re: how to solve equation with two unknowns

    It’s a TI84 calculator
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  5. #5
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    Re: how to solve equation with two unknowns

    There is a free graphing utility called "Desmos" at https://www.desmos.com/calculator
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    Re: how to solve equation with two unknowns

    thank you for your help, it has been amazing!!
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