Use formula for the distance between two points with polar coordinates.[tex]A(r_1,\theta_1),B(r_2,\theta_2)
\\d= \sqrt{r_1^2+r_2^2-2r_1r_2cos{(\theta_1-\theta_2)}}
\\
\\A(4,12^o),B(3,73^o)
\\d= \sqrt{4^2+3^2-2\times 4\times 3\times cos{(73^o-12^o)}}
\\d= \sqrt{25-24\times cos{61^o}}
\\d= \sqrt{25-24\times cos{61^o}}
\\d \approx 3.66[/tex]
