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secondary 4 | A Maths
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Keith6156
Keith6156

secondary 4 chevron_right A Maths chevron_right Singapore

Please help. I am not sure of.

Date Posted: 4 years ago
Views: 173
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@inteleague
@inteleague's answer
35 answers (A Helpful Person)
1st
differentiate using product rule
sin(2x) is 2cos(2x)
cos^3(2x) is 3cos^2(2x) [-2sin(2x)]