Eric Nicholas K's answer to Kathy's Secondary 3 E Maths Singapore question.
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For part (c), you are not allowed to use any angles to approach this question. In particular, we are not allowed to write down angle DAC, then angle EAC, then cosine EAC (although the question does not explicitly state this).
We must find another way to do the question without actually using the values of any angle.
We must find another way to do the question without actually using the values of any angle.
Date Posted:
5 years ago