- #1

tony873004

Science Advisor

Gold Member

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## Homework Statement

[tex]\int {x^2 \sin \pi x\,dx} [/tex]

What does this mean?

This:

[tex]\int {x^2 \sin \left( \pi \right)x\,dx} [/tex], in which case why didn't they write [tex]\int {x^3 \sin \left( \pi \right)\,dx} [/tex]

Or this:

[tex]\int {x^2 \sin \left( {\pi x} \right)\,dx} [/tex], which I'm guessing is right, except that in a previous chapter I interpreted [tex]\sec \theta \,\tan \theta [/tex] to be [tex]

\left( {\sec \theta } \right)\,\left( {\tan \theta } \right)

[/tex]

instead of

[tex]

\sec \left( {\theta \,\tan \theta } \right)

[/tex]