19.5. Show that sin(n+1/2)0 2 sin 0/2 cos 0/2- cos(n +1/2)0 2 sin 0/2 + cos 0+ cos 20 + + cos ne %3D sin 0+ sin 20+ . .+sin no %3D The first equality is due to Lagrange.
19.5. Show that sin(n+1/2)0 2 sin 0/2 cos 0/2- cos(n +1/2)0 2 sin 0/2 + cos 0+ cos 20 + + cos ne %3D sin 0+ sin 20+ . .+sin no %3D The first equality is due to Lagrange.
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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Question
i need the answer quickly
![19.5. Show that
sin(n + 1/2)0
2 sin 0/2
cos 0/2- cos(n+1/2)0
2 sin 6/2
1
+ cos 0+ cos 20+ .+ cos no
sin 0+ sin 20+ +sin no
...
The first equality is due to Lagrange.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F897cea0a-33c0-4fb1-8a8d-7ad9b1c6fd34%2F0e594b6c-c55c-4814-9174-37fed974d6ec%2F5dwbja_processed.jpeg&w=3840&q=75)
Transcribed Image Text:19.5. Show that
sin(n + 1/2)0
2 sin 0/2
cos 0/2- cos(n+1/2)0
2 sin 6/2
1
+ cos 0+ cos 20+ .+ cos no
sin 0+ sin 20+ +sin no
...
The first equality is due to Lagrange.
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