cosh^(4)(x)-sinh^(4)(x)=

Prove that cosh^(2)x-sinh^(2)x=1

P.T cosh^(2)x+sinh^(2)x=cosh2x

Prove that cosh(2x)-1=2sinh^(2)x

Show that (cosh(2x)-1)/(sinh(2x)) = (sinh(2x))/(1+cosh(2x))=tanhx

is sinh^(-1)(2)+sinh^(-1)(3)=xth cosh(x)

int(sqrt(1-x^(2))+sqrt(1+x^(2)))/(sqrt(1-x^(4)))dx=(A)cosh^(-1)x+sin^(-1)x+c(B)cosh^(-1)x+cos^(-1)x+c(C)sinh^(-1)x+sin^(-1)x+c(D)sinh^(-1)x+cos^(-1)x+c

Prove that (coshx-sinhx)^(n)=cosh(nx)-sinh(nx)

sinh(cosh^(-1)x)=