Question 8 - A-Level Maths

Exam Board	AQA
Module	Further AS Paper 1 (Further AS Paper 1)
Year	2020
Session	June
Topic	Hyperbolic functions

Prove that
$\tanh ^ { - 1 } x = \frac { 1 } { 2 } \ln \left( \frac { 1 + x } { 1 - x } \right)$
8
Prove that the graphs of $$y = \sinh x \quad \text { and } \quad y = \cosh x$$ do not intersect.