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## Bharati Book Depot ### हल **हल है ysec² x = [ sin xsec² x dx** ⇒ ysec²x = f sin x / cos x cos x -dx ⇒ y sec² x = sec x **यदि y = (sin x) तो वह ज्ञात करें।** **हल** दिया है y = (sin x) Diff. both side 1 dy / y dx = logs 1 dy / y dx = logs 1 dy / y dx = logs dy / dx = logs dy = (sin x) dx...

## Bharati Book Depot ### हल **हल है ysec² x = [ sin xsec² x dx** ⇒ ysec²x = f sin x / cos x cos x -dx ⇒ y sec² x = sec x **यदि y = (sin x) तो वह ज्ञात करें।** **हल** दिया है y = (sin x) Diff. both side 1 dy / y dx = logs 1 dy / y dx = logs 1 dy / y dx = logs dy / dx = logs dy = (sin x) dx **प्रश्न 6. हल करें:** **हाल** दिया है dx / (x² + 2xy - x²) **Put** y = vx ⇒ dx / (x² + 2xy - x²) = dx / (x² + 2vx² - x²) = dx / x² [1 + 2v - 1] = dx / x² [2v] = 1 / 2x² dv / v = 1/2 [1/v²] dv ⇒ ∫ dx / (x² + 2xy - x²) = ∫ 1 / 2 [1 / v²] dv ⇒ ∫ dx / (x² + 2xy - x²) = -1 /2v + c ⇒ ∫ dx / (x² + 2xy - x²) = -1 / 2y / x + c

Tags

calculus differential equations mathematics
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