A-Level Further Maths E6-01 Further Integration: Integrating (1-x^2)^(-½)

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for the 1/1+x^2 one u will get integral of sec^2x/sec^2x du right and then integrated gives u u+c
and u = arctanx
so arctanx+c?

KARMA-qtvn
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Would we need to know about sec or cosec substitutions, in further maths too? Or would we still be given them

kashoot