Step 1: Solution-(1) Given: For R = [0,1] × [0,1] 2 I = √ √(xy)² cos(x³)dxdy R Our aim is to evaluate the given integral Step 2: Calculation: I = S√(xy)² cos(x³)dxdy R I = S₁₂ f₁ x² y² cos(x³) dxdy I = (f²x² cos(x³ ) d x) (f₁ y²dy) = Let x³ 3 t⇒ 3x² dx = dt f₁² fox² cos(x³) dx = cos(t)dt fox² cos(x³)dx = (sint) | So x² cos(x3)dx=(sin1 - sin0) Sox2 cos(x³)dx x² cos(x³)dx = (sin1 - 0) sin1 = 3 So y²dy = (5) 1 0 So y² dy = -0 = 1/3 Hence we get: I 3 = (sinl) (½³) = (sinl) 9

Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
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ISBN:9781337111348
Author:Bruce Crauder, Benny Evans, Alan Noell
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Section2.1: Tables And Trends
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Where the 1/3 come from pls explain?
Step 1: Solution-(1)
Given: For R
=
[0,1] × [0,1]
2
I = √ √(xy)² cos(x³)dxdy
R
Our aim is to evaluate the given integral
Step 2: Calculation:
I =
S√(xy)² cos(x³)dxdy
R
I = S₁₂ f₁ x² y² cos(x³) dxdy
I = (f²x² cos(x³ ) d x) (f₁ y²dy)
=
Let x³
3
t⇒ 3x² dx
= dt
f₁²
fox² cos(x³) dx = cos(t)dt
fox² cos(x³)dx =
(sint) |
So x² cos(x3)dx=(sin1 - sin0)
Sox2 cos(x³)dx
x² cos(x³)dx
=
(sin1 - 0)
sin1
=
3
So y²dy = (5)
1
0
So y² dy = -0 = 1/3
Hence we get:
I
3
= (sinl) (½³) = (sinl)
9
Transcribed Image Text:Step 1: Solution-(1) Given: For R = [0,1] × [0,1] 2 I = √ √(xy)² cos(x³)dxdy R Our aim is to evaluate the given integral Step 2: Calculation: I = S√(xy)² cos(x³)dxdy R I = S₁₂ f₁ x² y² cos(x³) dxdy I = (f²x² cos(x³ ) d x) (f₁ y²dy) = Let x³ 3 t⇒ 3x² dx = dt f₁² fox² cos(x³) dx = cos(t)dt fox² cos(x³)dx = (sint) | So x² cos(x3)dx=(sin1 - sin0) Sox2 cos(x³)dx x² cos(x³)dx = (sin1 - 0) sin1 = 3 So y²dy = (5) 1 0 So y² dy = -0 = 1/3 Hence we get: I 3 = (sinl) (½³) = (sinl) 9
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