http://curriculum.kcdistancelearning.com…
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The easiest would be to use the sine rule
sin B / b = sin C / c
sin 47 / 13 = sin C / 17
17 * sin 47 = 13 sin C
sin C = 0.95638
C = sin^-1 (0.95638)
= 73.015
sin B / b = sin C / c
sin 47 / 13 = sin C / 17
17 * sin 47 = 13 sin C
sin C = 0.95638
C = sin^-1 (0.95638)
= 73.015
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73.015