Recent content by Flammadeao

Oh man, that would make sense... Gah, thankyou :)

Homework Statement \int\frac{sin(2x)}{1+cos(x)^2} Homework Equations None? The Attempt at a Solution I know I can use a trig identity to end up with a numerator of -- 2sin(x)cos(x) So: \int\frac{2sin(x)cos(x)}{1+cos(x)^2} I am using u=1+cos(x)^2 and...

Is anyone here able to help me or point me in the right direction? Iron ores often involve a mixture of oxides and contain both Fe 2+ and Fe 3+ ions. Such an ore may be analyzed for its iron content by dissolving it in an acidic solution, reducing all of the iron to Fe 2+ ions and then...