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secondary 4 | A Maths
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Sonia
Sonia

secondary 4 chevron_right A Maths chevron_right Singapore

Hi! Please help me with (b)(i),(ii),(iii)..
I keep doing them in the “differentiation” method but it’s all wrong .. Idk how to use integration in these.. Thx so mich

Date Posted: 4 years ago
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Jiayang
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I don't understand wym by the "differentiation" method :/
Sonia
Sonia
4 years ago
Like i bring the power to the front ...


sin2(x/3) =

2sin(x/3)(-cos(x/3)) =

-2sin(x/3)


I brought the power 2 to the front then i integrate sin -> -cos
Jiayang
Jiayang
4 years ago
For trig you can integrate sin, cos and sec². Anything else you see you'll have to use your trig identities and convert them sin, cos, sec².
Sonia
Sonia
4 years ago
Ahh i see.. Thank youu