Answer:
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Step-by-step explanation:
Remember for RIGHT triangles such as this
S-O-H-C-A-H-T-O-A
SIN 75 = opposite / hypotenuse
sin 75 = BC / 12
12 sin 75° = BC = 11.59 cm
COS 75 = adjacent / hypotenuse
cos 75° = AC/12
12 cos 75° = AC = 3.11 cm
Now you have the base and the height
Area = 1/2 b * h
= 1/2 11.59 * 3.11 = 18 cm^2
