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2. : (a) For n ≥ 1, show that 1+z+2²+...+ 2¹: (b) Hence, show that 1+ cos 0 + cos 20 + 12+1 2 #1 7 1-z + cos n0 = =+ sin(n+¹)0 2 sin

2. : (a) For n ≥ 1, show that 1+z+2²+...+ 2¹: (b) Hence, show that 1+ cos 0 + cos 20 + 12+1 2 #1 7 1-z + cos n0 = =+ sin(n+¹)0 2 sin

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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please do a) and b) , thanks??

2. : (a) For n ≥ 1, show that 1+z+z²+...+ 2¹: (b) Hence, show that 1+ cos 0 + cos 20 + 12+1 1-z + cos no = + 7,21 sin(n+¹)0 2 sin
Transcribed Image Text:2. : (a) For n ≥ 1, show that 1+z+z²+...+ 2¹: (b) Hence, show that 1+ cos 0 + cos 20 + 12+1 1-z + cos no = + 7,21 sin(n+¹)0 2 sin
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