a) By expanding sin (2x + x) and using double angle formulae, show that sin 3x = 3 sin x - 4 sin°x. Hence, prove that 5 sin'x dx = 24
a) By expanding sin (2x + x) and using double angle formulae, show that sin 3x = 3 sin x - 4 sin°x. Hence, prove that 5 sin'x dx = 24
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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Do question a) only.
Transcribed Image Text:a) By expanding sin (2x + x) and using double angle formulae, show that
sin 3x = 3 sin x - 4 sin°x . Hence, prove that
5
sin'x dx =
24
b) Evaluate (x? + 1) In x dx .
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