Erfana Beevee Binte Hassan Shariff's answer to mary's Secondary 3 A Maths Singapore question.
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We start with LHS as it is more complicated. We change cos 2A to that which has sin A in it since the denominator has sin A and we are trying to show something that has sin A. So, we do not want to have any cos A as we simplify.
Hope this helps.
Hope this helps.
Date Posted:
9 months ago
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