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secondary 4 | A Maths
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Georgia Jansen
Georgia Jansen

secondary 4 chevron_right A Maths chevron_right Singapore

Just need part 3 with as much explanation and elaboration as possible thank u and sorry!!!

Date Posted: 6 months ago
Views: 27
Eric Nicholas K
Eric Nicholas K
6 months ago
I didn’t see part 3 in the photo.

First part is very straightforward - the supplementary angle rule.
Eric Nicholas K
Eric Nicholas K
6 months ago
For part ii you need a series of formulae and surds simplification.

Clue: 75 = 45 + 30

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Eric Nicholas K
Eric Nicholas K's answer
3654 answers (Tutor Details)
Three things you need to know here.

1. Usage of addition angle formulae by splitting the angles into the sum or difference of special angles

2. Knowledge of special angles and their values

3. Rationalisation of surds