Eric Nicholas K's answer to Elle's Junior College 2 H2 Maths Singapore question.
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We need to be careful when integrating sin^2 x. We cannot integrate this the usual way we do by raising the power by 1 and dividing by the new power.
In other words.
(sin x)^2
does not integrate to
(sin x)^3 / 3
and using the chain rule reversal
(sin x)^3 / (3 cos x)
does not work either since sin x is non-linear.
As always, my answer might be wrong.
In other words.
(sin x)^2
does not integrate to
(sin x)^3 / 3
and using the chain rule reversal
(sin x)^3 / (3 cos x)
does not work either since sin x is non-linear.
As always, my answer might be wrong.
Date Posted:
3 years ago
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