मराठी

General solution of dddydx+ytanx=secx is ______. - Mathematics

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प्रश्न

General solution of `("d"y)/("d"x) + ytanx = secx` is ______.

पर्याय

  • y secx = tanx + c

  • y tanx = secx + c

  • tanx = y tanx + c

  • x secx = tany + c

MCQ
दीर्घउत्तर
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उत्तर

General solution of `("d"y)/("d"x) + ytanx = secx` is y secx = tanx + c.

Explanation:

The given differential equation is `("d"y)/("d"x) + y tan x = secx`

Since, it is a linear differential equation

∴ P = tan x and Q = sec x

Integrating factor I.F. = `"e"^(int Pdx)`

= `"e"^(int tanx  "d"x)`

= `"e"^(log secx)`

= sec x

∴ Solution is `y xx "I"."F". = int "Q" xx "I"."F". "d"x + "c"`

⇒ `y xx secx = int secx * secx  "d"x + "c"`

⇒ `y sec x = int sec^2x  "d"x + "c"`

⇒ y secx = tanx + c

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पाठ 9: Differential Equations - Exercise [पृष्ठ २०१]

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एनसीईआरटी एक्झांप्लर Mathematics [English] Class 12
पाठ 9 Differential Equations
Exercise | Q 71 | पृष्ठ २०१

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