Kahwai's answer to :-)'s Secondary 3 E Maths Singapore question.
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64=36+81-108cos(theta)
Cos(theta) = 0.49
Theta is closed to 60 degree
Cos(theta) = 0.49
Theta is closed to 60 degree
Date Posted:
3 years ago
I don really understand sorry
Read your text book
Cosine rule
This is a standard question
Cosine rule
This is a standard question
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