Boy Mow Chau's answer to alexis chia's Secondary 4 E Maths Singapore question.
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angle BAC is found to be a right-angle; this makes the calculations much easier; just use basic sine & cosine; no need to involve sine rule and cosine rule.
pls re-check calculations.
pls re-check calculations.
Date Posted:
4 years ago
thank u so much!!!
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