Use the formulas 1 1 i0 cos 0 = (e" + e-) and sin0 = 2i to obtain the identity 1 (cos 40 – 4 cos 20 + 3). 8 sin 0 = -
Use the formulas 1 1 i0 cos 0 = (e" + e-) and sin0 = 2i to obtain the identity 1 (cos 40 – 4 cos 20 + 3). 8 sin 0 = -
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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Transcribed Image Text:Use the formulas
1
1
i0
cos 0 = ; e +e®) and sin0
to obtain the identity
1
(cos 40 – 4 cos 20 + 3).
8
sin 0
=
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