how to solve equation with two unknowns

Apr 2019
3
0
rugby
hard question.PNG

please can someone explain to me how i can solve the above equation?
 
Dec 2014
130
101
USA


(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.
 

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Apr 2019
3
0
rugby
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?
 
Dec 2014
130
101
USA
It’s a TI84 calculator
 
Apr 2019
3
0
rugby
thank you for your help, it has been amazing!!