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**Homework Statement**

If [tex]F_{B} = 5kN[/tex] and the resultant force acts along the positive u axis, determine the magnitude of the resultant force.

**The attempt at a solution**

[tex]F_{Rx} = F_{R}cos 30[/tex]

[tex]F_{Ry} = F_{R}sin 30[/tex]

[tex]F_{Rx} = 3 + 5cos\theta[/tex]

[tex]F_{Ry} = 5sin\theta[/tex]

Therefore, [tex]\frac{3 + 5cos\theta}{5sin\theta} = \sqrt{3}[/tex]

Is this correct so far? I don't know how to isolate [tex]\theta[/tex]

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