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secondary 3 | A Maths
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Daddy
Daddy

secondary 3 chevron_right A Maths chevron_right Singapore

Pls solve ii

Date Posted: 1 year ago
Views: 158

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jamie lee jia qian
Jamie Lee Jia Qian's answer
4 answers (Tutor Details)
1st
cos(3A)= cos(A+2A) this is the trigo addition formula