** Please see the attachment for the complete problem description **
iv) Series C and S are defined as follows:
C=2cos x + 4 cos 2x + 8 cos 3x + ... + 2^n cos nx
S=2 sin x + 4 sin 2x + 8 sin 3x + ... + 2^n sin nx
Show that C+iS is a geometric series. Hence show that:
S= 2sin x - 2^n+1 sin ((n+1)x) + 2^n+2 sin nx / 5 - 4 cos x
Find a similar expression for C.© BrainMass Inc. brainmass.com October 10, 2019, 2:48 am ad1c9bdddf
This solution shows how to clearly assess the given geometric series with a geometric rate.