Recent content by anon413

Thx for the help rocomath I think I can handle it myself from here.

Sorry a Quadrant 2.

Okay so if I was to use cosine which is X/R. I would receive a negative answer because of the negative x. Tell me if I'm wrong.

Yes they are the same, but negative why exactly?

Not sure what exactly are reference angles, but I do know how to convert from radians to degrees.

[SOLVED] Unit Circle How can I use the unit circle to get the right answer. I understand the 30 60 90 and 45 45 90 triangles, but come to a problem when using this method with cosine. For example cosine(3pi/2) is -[2^(1/2)]/2. Using my method I get the positive. Please explain the methods of...

thx stupidmath. I knew I got the right udu for dx.

I guess I will attempt this on my own that's for the help.

Ok ill try stupid maths method I would get the integral of (((u^2+1)/2)^2-1)/(u) what would my du be

Yes thank you, that command latex is complicated I'll try to learn it.

How did you type that exactly.

Sorry made a mistake in typing the denominator (2x-1)^(1/2) I am slightly displexic

Homework Statement Find the indefinite integral. The antiderivative or the integral of (x^2-1)/(x^2-1)^(1/2)dx Homework Equations The Attempt at a Solution Tried using (x^2-1)^(1/2) as u and udu for dx and I solved for x but I am still left with a 1 on top not sure how to...