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secondary 4 | A Maths
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Ho jun jie
Ho Jun Jie

secondary 4 chevron_right A Maths

Q3b and Q4c on trigo. Thanks.

Date Posted: 6 years ago
Views: 330

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Bai Lijun
Bai Lijun's answer
49 answers (Tutor Details)
1st
The questions involve half angle formula, which is NOT covered by our syllabus. However, you can derive them by the double angle formula. But take note that you need to decide the sign when taking the square root by considering the range of the angle. I don't give you the full details in the solution here. If you have problems, please let me know so that I could give you more details.
Ho jun jie
Ho Jun Jie
6 years ago
Thanks!