Answer:
a=17.32 b= 8.66 c = 15 d=5
Explanation:
sin(60) = b/10 so b = 8.66, also
cos(60) = d/10 so d = 5
sin(30) = b/a, and we solved for b so sin(30) = 8.66/a so a = 8.66/.5 = 17.32
and to find c, we have cos (30) = c/a, we know cos(30)=c/17.32 so c = 15