a)
[tex] \alpha = {60}^{o} \\ \\ a = 1.5 \\ b = 1.5 \sqrt{3} [/tex]
b)
[tex] \alpha = {30}^{o} \\ \\ b = 4 \sqrt{3} \\ c = 8[/tex]
c)
[tex] \alpha = {60}^{o} \\ \\ a = 4 \\ c = 8[/tex]
d)
[tex] \alpha = {60}^{o} \\ \\ a = 2 \frac{1}{2} \div 2 = \frac{5}{2} \times \frac{1}{2} = \frac{5}{4} = 1 \frac{1}{4} \\ b = 1 \frac{1}{4} \sqrt{3} [/tex]
e)
[tex] \alpha = {30}^{o} \\ \\ a = 1 \\ c = 2[/tex]
f)
[tex] \alpha = {30}^{o} \\ \\ b = \frac{1}{5} \sqrt{3} \\ c = \frac{2}{5} [/tex]