Tham KY's answer to Nur's Junior College 2 H3 Maths question.
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Date Posted:
6 years ago
Thanks...
Sorry...but i want to ask...this answer is correct but why you not multiple with cos
Question asked for "angle cosine", so leave answer in cosine ratio, do not evaluate the angle. I used the dot product, which has angle cosine in its formula, just rearrange to make cosDeta the subject.
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