A = 15
5sqrt 2
B = 45 C
Angle C = 180 - 45 -15 = 120
So....using the Law of Sines
AC /sin 45 = AB / sin 120
AC / ( 1/ sqrt 2) = 5 sqrt 2 / ( sqrt (3) / 2)
AC = (5 sqrt 2 ) ( 1 /sqrt 2) / ( sqrt (3) / 2)
AC = 5 * 2 / sqrt 3
AC = 10 /sqrt 3 = (10/3)sqrt (3)
Find AC such that AB= 5sqrt2 and angle b= 45 and angle a=15.
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AD = (5√2) * sin(45º)
AC = AD / cos(30º)