Apr 17, 2012 · i know that Cosh(x) = (E^x + E^-x ) / 2 how do i prove that Cosh(x) = Cos(ix) , where i is the imaginary unit similarly Cosh(ix) = Cos(x) and Sin(ix)...

Mar 12, 2011 · Homework Statement Homework Equations from the identities found on the internet: cos(x)=\\frac{(e^{ix}+e^{-ix})}{2} and cosh(x)=\\frac{(e^{x}+e^{-x})}{2} The Attempt at a …

Oct 8, 2015 · Free Online Scientific Notation Calculator. Solve advanced problems in Physics, Mathematics and Engineering. Math Expression Renderer, Plots, Unit Converter, Equation …

Feb 13, 2009 · coshx(sinhx)-(coshx)coshx/coshx... is this right if not help please It's harder to write mathematical expressions on a single line than on paper, where you can write fractions …

Feb 14, 2016 · Homework Statement I was told that coshx = (e^x + e^-x) / 2 , why cosh2x = (e^2x - e^-2x) / 2 ? Homework EquationsThe Attempt at a Solution

Mar 30, 2016 · Hi I was wondering how you get this when taking the limit of T going to 0 From this expression of S: Please help I don't see how ln infinity goes to uB/KbT (used u to represent …

Sep 23, 2010 · Homework Statement Expand the function into Fourier series f(x) = coshx, |x|\leq \pi Homework Equations Fourier series will be... Insights Blog -- Browse All Articles -- Physics …

Apr 12, 2015 · I'm doing Sturm-Loiuville problems and I need to find the eigenvalues for λ I'm having difficulty understanding the trivial solutions for the hyperbolic sin and cos when they …

Apr 22, 2010 · Hyperbolic functions :((( Homework Statement Question is: and Homework Equations Now from what i can recall the formula for sin(A+B) = sinAcosB+sinbcosA so same …

Sep 27, 2017 · As #tanh(x/2)=sqrt((coshx-1)/(coshx+1))# = #sqrt(((coshx-1)(coshx+1))/((coshx+1)(coshx+1))# = #sqrt(cosh^2x-1)/(coshx+1)#