Feb 4, 2014 Thread starter #1 T tmt Active member Jan 15, 2014 236 $ \displaystyle{ \int { 4 \cos(3x) } \,dx } $ . Hi, for this problem, is this the same as 12*cos*x? Thanks,

$ \displaystyle{ \int { 4 \cos(3x) } \,dx } $ . Hi, for this problem, is this the same as 12*cos*x? Thanks,

Feb 4, 2014 Admin #2 Jameson Administrator Staff member Jan 26, 2012 4,043 Hi tmt, Nope, that's not true. You can't multiply through like that with trig functions. Start with it this way... What is \(\displaystyle \int \cos(x)dx\)? What is \(\displaystyle \int \cos(3x)dx\)?

Hi tmt, Nope, that's not true. You can't multiply through like that with trig functions. Start with it this way... What is \(\displaystyle \int \cos(x)dx\)? What is \(\displaystyle \int \cos(3x)dx\)?