# how to solve equation with two unknowns

#### rex2012

please can someone explain to me how i can solve the above equation?

#### Cervesa

(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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#### rex2012

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?

#### Cervesa

It’s a TI84 calculator

MHF Helper

#### rex2012

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