Another question from O Level Additional Mathematics (A-Math).
lijun(: said…
i came across this qu that day, and i really want to clarify if the method i used is correct or not.int(tan^2x – x^3)
i changed it to int(sec^2x – 1 – x^3) instead, cos i don’t think we can integrate tan.
is that feasible?
Absolutely. Since tan^2 x can’t be integrated, you must think of alternative by making use of the relationship of tan^2 x + 1 = sec^2 x
Hi,
I'm Ai Ling. I enjoy coaching students who have challenges with
understanding and scoring in 'O' Level A-Maths and E-Maths. 
yes, it’s feasible. we dont learn how to integrate tan so we have to change it to sec^2x – 1. great attempt :)
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