OCR MEI Further Pure Core 2021 November — Question 16

Exam BoardOCR MEI
ModuleFurther Pure Core (Further Pure Core)
Year2021
SessionNovember
TopicHyperbolic functions

16
  1. Show using exponentials that \(\cosh 2 u = 1 + 2 \sinh ^ { 2 } u\).
  2. Show that \(\int _ { 0 } ^ { 2 } \frac { x ^ { 2 } } { \sqrt { 4 + x ^ { 2 } } } \mathrm {~d} x = 2 \sqrt { 2 } - 2 \ln ( 1 + \sqrt { 2 } )\).