Question

whats the indefinite integral of sin3x cos 3x dx?
Also can I get a link of the identities? my teacher has included 1 and the textbook only 1 or 2. thanks!

Answer 1

\[\int\limits_{}^{} \frac{ 1 }{ 2 } \sin 6t +\sin(0)\]
which gives \[\frac{ 1 }{ 12 } \cos 6x + c\]
But the correct answer is
\[\frac{ -1 }{ 12 } \cos 6x + c\]
Please explain

Answer 2

Integral of sin 6x is -cos 6x /6.

Answer 3

oh right..rookie mistake, btw do u have any link to identies containing cos and sin?

Answer 4

https://www.math.ucdavis.edu/~kouba/CalcTwoDIRECTORY/trigintdirectory/TrigInt.html