Eric Nicholas K's answer to LockB's Secondary 3 A Maths Singapore question.
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The only way to simplify Tan 3A is to split them into 2A + A because this will allow us to use addition and/or double angle formulae to simplify our answers. We cannot use 2 x 1.5A to do the same job as we will get stuck halfway.
Date Posted:
3 years ago
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