# A-Math Integration of tan^2 x

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

### Related Post

How to choose an effective tutor or tuition centre for O Level Students As I was flipping through the papers, there are many advertisements on effective tutors, results,improvements guaranteed, school teachers, scholars et...
Differentiation & Integration Mastery Workshop (Includes Kinematics too!) Update: Click here for early bird registration. Dear Students, Do you know that Differentiation & Integration are 2 very important secti...
A-Math P & C Clarification Another question from O Level Additional Mathematics (A-Math). lijun(: said... hey. i just want to clarify something that i'm not very sure of. ...
What Happens When Integration Question Is in the form of Product? I posted an interesting question on Integration here. Allow me to repeat. There isn’t any product rule nor quotient rule in Integration. So to I...
A-Math More Trigo Graphs Another question for O Level Additional Mathematics (A-Math). On the same diagram, sketch the graphs of y=sin 3x & y=cos2x, for x between 0...

### Ai Ling Ong

Hi, I'm Ai Ling Ong. I enjoy coaching students who have challenges with understanding and scoring in 'O' Level A-Maths and E-Maths. I develop Math strategies, sometimes ridiculous ideas to help students in understanding abstract concepts the fast and memorable way. I write this blog to share with you the stuff I teach in my class, the common mistakes my students made, the 'way' to think, analyze... If you have found this blog post useful, please share it with your friends. I will really appreciate it! :)

### One Response to A-Math Integration of tan^2 x

1. LinwooD says:

yes, it's feasible. we dont learn how to integrate tan so we have to change it to sec^2x - 1. great attempt :)