1. (cos 2y-3x²y²) dx + (cos 2y - 2x sin 2y - 2x³y)dy = 0 - 2. [x√x² + y² − y]dx+ (y√x² + y² − x)dy = 0 - 3. (xy² + x-2y+3)dx + x²ydy = 2(x + y)dy when x = 1, y = 1

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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Differentiate using exact differential equation
1. (cos 2y-3x²y²) dx
+(cos 2y - 2x sin 2y - 2x³y)dy = 0
2. (x √ x² + y² = y) dx + (y√/x² + y² − x)dy=0
3. (xy² + x-2y+3)dx + x² ydy = 2(x + y)dy
when x = 1, y = 1
4. (y² cos x -3x²y - 2x)dx
y(0)= e
+(2 y sin x-x³ + ln y)dy = 0
5. (1−xy) ² dx + [y² + x² (1− xy) ² ]dy = 0
when x = 4, y = 1
Transcribed Image Text:1. (cos 2y-3x²y²) dx +(cos 2y - 2x sin 2y - 2x³y)dy = 0 2. (x √ x² + y² = y) dx + (y√/x² + y² − x)dy=0 3. (xy² + x-2y+3)dx + x² ydy = 2(x + y)dy when x = 1, y = 1 4. (y² cos x -3x²y - 2x)dx y(0)= e +(2 y sin x-x³ + ln y)dy = 0 5. (1−xy) ² dx + [y² + x² (1− xy) ² ]dy = 0 when x = 4, y = 1
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