It's an easy problem, yet... I don't know how to go about solving it. Can anyone shed some light?
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Here is a hint: is the derivative of something. Hope this helps!
Right, sec 3x tan 3x becomes sec 3x. What confuses me is what's to be done after that. = Do I use the substitution rule?
Let . Then upon substitution you get. Go from there.
How can I proceed? Do I use the general power rule? I end up with sec which apparently is not the answer.
go through your inventory of the derivatives of the trig functions. such as
Could you please be a little bit more specific? is ... how does that help me? I already did that step. My final answer is wrong though.
If the derivative of is , then what is the integral of ?
sec x. But I already did that part. Why are you bringing it up?
by substitutin u in you get sec(u) as there is 1/3 outside in the integral the final answer comes to 1/3*sec(3x)
well, you have , so after you integrate that, and substitute back in for , what do you think?
Originally Posted by Fermatwannabe by substitutin u in you get sec(u) as there is 1/3 outside in the integral the final answer comes to 1/3*sec(3x) Thank you
Well that is the answer to the original integral you posted. Can you double check it? Unless your answer is
Originally Posted by Archduke01 Thank you is it 1/cos(3x) if not then im stumped
Originally Posted by Archduke01 It's an easy problem, yet... I don't know how to go about solving it. Can anyone shed some light? You are trying to find the antiderivative of The derivative of is So the antiderivative of is Then what would be the antiderivative of ?
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