Answer:
x = 9.99
Step-by-step explanation:
Using sine law , we have
Sine F/f = sine E/x
Sine 55deg/12 = Sine43deg/x
0.8192/12 = 0.6820/x
Cross multiply
0.8192 X x = 12 x 0.6820
0.8192x = 8.184
Divide both sides by 0.8192
0.8192x/0.8192=8.184/0.8192
x = 9.99
