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

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.2: Trigonometric Equations
Problem 106E
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Do question a) only. 

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 .
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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