identify whether the following equations are exact or need an integrating factor 6. (3x tan y...

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identify whether the following equations are exact or need an integrating factor 6. (3x tan y - 2y)dx + (x (sec y)² + 4x³y3 + 3xy²) = 0 7. (3y2 cot x + sin x cos x )dx- 2ydy 0 8. (2xy -e2y)dx + (x² + xe2y - y)dy = 0 identify whether the following equations are exact or need an integrating factor 6. (3x tan y - 2y)dx + (x (sec y)² + 4x³y3 + 3xy²) = 0 7. (3y2 cot x + sin x cos x )dx- 2ydy 0 8. (2xy -e2y)dx + (x² + xe2y - y)dy = 0