I am reading a book on multivariable calculus for my course and I have tried the question :(adsbygoogle = window.adsbygoogle || []).push({});

[tex]

\int_{0}^{\frac{\pi}{4}} dx \int_{0}^{Sec(x)} y^3 dy

[/tex]

apparently the answer is 1/3..I have TRIED to get this answer... yet i cannot yield 1/3....help!!!

(anyone from the UK...I have aA Level in maths {up to P3 for Pure and M3 for mechanics, grade A...i know iterated integrals but this one stumps me}...arsegood

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# Book on multivariable calculus

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