EM-3102
Cosine rule
E Math · Secondary 4 · Medium · Cosine rule
In a triangle, the sides have lengths , and units.
Using the cosine rule, find the angle opposite the side of length 9.
Give your answer correct to 1 decimal place.
Using the cosine rule, find the angle opposite the side of length 9.
Give your answer correct to 1 decimal place.
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