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Trig integral

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,
 

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 \(\displaystyle \int \cos(3x)dx\)?