| Not a bad quiz, but needs tidying up. sec^2(x)-1 = tan^2(x) [you forgot the ^2]; cosh(2x)=1+2sinh^2(x) [you have a - , remember Osborn's Rule]; you don't need brackets round the numerators in the tan(2x) and tanh(2x) formulae, but only for the denominators [I couldn't understand why it wasn't accepting the right answers]. Thanks though, it's a nice change to see one of these with hyperbolic functions too. |