Question

Cosh x = 25/7, x > 0

Answer 1

we have

cosh(x)=25/7 and x>0

Remember that

$\cos h^2(x)-\sinh ^2(x)=1$

substitute the given function

$(\frac{25}{7})^2-\sinh ^2(x)=1$$\sinh ^2(x)=\frac{625}{49}-1$$\sinh ^2(x)=\frac{576}{49}$

therefore

sinh(x)=24/7