Mathaddict100's answer to AX's Secondary 3 A Maths Singapore question.
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These are the steps involved.For you to answer the qn,you need to understand the half-angle concept really well.The idea is simply dividing the periods and if you divide the period on one side,you have to do the same for the other.This works on any trigo with double angle properties.Hope this helps. :)
Date Posted:
5 years ago