рд╣рд┐рдВрджреА

If ЁЭСж =ЁЭСеtanтБбЁЭСе +тИЪЁЭСе2+1/2,find ЁЭССтБвЁЭСж/ЁЭССтБвЁЭСе? - Mathematics

Advertisements
Advertisements

рдкреНрд░рд╢реНрди

If `y = x^tan x + sqrt(x^2 + 1)/2, "find"  (dy)/(dx) ?`

Find `(dy)/(dx), if y = x^tanx + sqrt(x^2 + 1)/2`.

рдпреЛрдЧ
Advertisements

рдЙрддреНрддрд░

`y = x^tanx + sqrt(x^2 + 1)/2    ...(i)`

Let u = `x^tanx, v = sqrt(x^2 + 1)/2`

Equation (i) becomes

y = u + v

Differentiate w.r.t. x,

`(dy)/(dx) = (du)/(dx) + (dv)/(dx)`

Now, u = xtan x

taking log on both sides

log u = log (xtan x)

log u = tan x log x

Differentiate w.r.t. x,

`1/u (du)/(dx) = (tan x)/x + log x  sec2^2 x`

⇒ `(du)/(dx) = u[(tan x)/x  + log x  sec^2 x]`

⇒ `(du)/(dx) = x^tan x[(tan x)/x + log x  sec^2 x]`

Again take,

v = `sqrt(x^2 - 1)/2`

`(dv)/(dx) = 1/2 xx 1/(2sqrt(x^2 + 1)) xx (2x)`

= `x/(2sqrt(x^2 + 1)`

Put the value `(du)/(dx) and (dv)/(dx)  "in equation" (ii),`

Now, `(dy)/(dx) = x^tanx[tan x/x + log x  sec^2 x] + x/(2sqrt(x^2 + 1)`

shaalaa.com
  рдХреНрдпрд╛ рдЗрд╕ рдкреНрд░рд╢реНрди рдпрд╛ рдЙрддреНрддрд░ рдореЗрдВ рдХреЛрдИ рддреНрд░реБрдЯрд┐ рд╣реИ?
рдЕрдзреНрдпрд╛рдп 11: Differentiation - Exercise 11.05 [рдкреГрд╖реНрда репреж]

APPEARS IN

рдЖрд░рдбреА рд╢рд░реНрдорд╛ Mathematics [English] Class 12
рдЕрдзреНрдпрд╛рдп 11 Differentiation
Exercise 11.05 | Q 60 | рдкреГрд╖реНрда репреж

рд╡реАрдбрд┐рдпреЛ рдЯреНрдпреВрдЯреЛрд░рд┐рдпрд▓VIEW ALL [1]

рд╕рдВрдмрдВрдзрд┐рдд рдкреНрд░рд╢реНрди

If the function f(x)=2x39mx2+12m2x+1, where m>0 attains its maximum and minimum at p and q respectively such that p2=q, then find the value of m.

 


Differentiate the following functions from first principles log cos x ?


Differentiate \[e^{\tan 3 x} \] ?


If \[y = \frac{1}{2} \log \left( \frac{1 - \cos 2x }{1 + \cos 2x} \right)\] , prove that \[\frac{ dy }{ dx } = 2 \text{cosec }2x \] ?


Differentiate \[\sin^{- 1} \left( 2 x^2 - 1 \right), 0 < x < 1\]  ?


Differentiate \[\sin^{- 1} \left\{ \frac{\sqrt{1 + x} + \sqrt{1 - x}}{2} \right\}, 0 < x < 1\] ?


Differentiate \[\cos^{- 1} \left( \frac{1 - x^{2n}}{1 + x^{2n}} \right), < x < \infty\] ?


If \[y = \sin^{- 1} \left( \frac{x}{1 + x^2} \right) + \cos^{- 1} \left( \frac{1}{\sqrt{1 + x^2}} \right), 0 < x < \infty\] prove that  \[\frac{dy}{dx} = \frac{2}{1 + x^2} \] ?

 


If  \[y = \cot^{- 1} \left\{ \frac{\sqrt{1 + \sin x} + \sqrt{1 - \sin x}}{\sqrt{1 + \sin x} - \sqrt{1 - \sin x}} \right\}\],  show that \[\frac{dy}{dx}\] is independent of x. ? 

 


Find  \[\frac{dy}{dx}\] in the following case \[\frac{x^2}{a^2} + \frac{y^2}{b^2} = 1\] ?


Find  \[\frac{dy}{dx}\] in the following case \[\left( x^2 + y^2 \right)^2 = xy\] ?

 


If \[x \sin \left( a + y \right) + \sin a \cos \left( a + y \right) = 0\] Prove that \[\frac{dy}{dx} = \frac{\sin^2 \left( a + y \right)}{\sin a}\] ?


Differentiate  \[\sin \left( x^x \right)\] ?


Differentiate \[\left( \sin^{- 1} x \right)^x\] ?


Differentiate  \[x^{x \cos x +} \frac{x^2 + 1}{x^2 - 1}\]  ?


Differentiate \[\left( x \cos x \right)^x + \left( x \sin x \right)^{1/x}\] ?


Find \[\frac{dy}{dx}\]  \[y = x^x + \left( \sin x \right)^x\] ?


Find \[\frac{dy}{dx}\] \[y = x^{\log x }+ \left( \log x \right)^x\] ?


If \[x^y + y^x = \left( x + y \right)^{x + y} , \text{ find } \frac{dy}{dx}\] ?


If  \[x \sin \left( a + y \right) + \sin a \cos \left( a + y \right) = 0\] , prove that \[\frac{dy}{dx} = \frac{\sin^2 \left( a + y \right)}{\sin a}\] ?

 


If \[y^x + x^y + x^x = a^b\] ,find \[\frac{dy}{dx}\] ?


\[\text{ If }\cos y = x\cos\left( a + y \right),\text{  where } \cos a \neq \pm 1, \text{ prove that } \frac{dy}{dx} = \frac{\cos^2 \left( a + y \right)}{\sin a}\] ?

\[y = \left( \sin x \right)^{\left( \sin x \right)^{\left( \sin x \right)^{. . . \infty}}} \],prove that \[\frac{y^2 \cot x}{\left( 1 - y \log \sin x \right)}\] ?


If \[y = \left( \cos x \right)^{\left( \cos x \right)^{\left( \cos x \right) . . . \infty}}\],prove that \[\frac{dy}{dx} = - \frac{y^2 \tan x}{\left( 1 - y \log \cos x \right)}\]?

 


Differentiate \[\tan^{- 1} \left( \frac{2x}{1 - x^2} \right)\] with respect to \[\cos^{- 1} \left( \frac{1 - x^2}{1 + x^2} \right),\text {  if }0 < x < 1\] ?


If \[\frac{\pi}{2} \leq x \leq \frac{3\pi}{2} \text { and y } = \sin^{- 1} \left( \sin x \right), \text { find } \frac{dy}{dx} \] ?


If \[x = a \left( \theta + \sin \theta \right), y = a \left( 1 + \cos \theta \right), \text{ find} \frac{dy}{dx}\] ?


If \[y = \sin^{- 1} \left( \frac{1 - x^2}{1 + x^2} \right) + \cos^{- 1} \left( \frac{1 - x^2}{1 + x^2} \right),\text{ find } \frac{dy}{dx}\] ?


If \[f\left( x \right) = \tan^{- 1} \sqrt{\frac{1 + \sin x}{1 - \sin x}}, 0 \leq x \leq \pi/2, \text{ then } f' \left( \pi/6 \right) \text{ is }\] _________ .


\[\frac{d}{dx} \left[ \log \left\{ e^x \left( \frac{x - 2}{x + 2} \right)^{3/4} \right\} \right]\] equals ___________ .

The derivative of \[\cos^{- 1} \left( 2 x^2 - 1 \right)\] with respect to  \[\cos^{- 1} x\]  is ___________ .


If y = cosec−1 xx >1, then show that \[x\left( x^2 - 1 \right)\frac{d^2 y}{d x^2} + \left( 2 x^2 - 1 \right)\frac{dy}{dx} = 0\] ?


If \[x = 3 \cos t - 2 \cos^3 t, y = 3\sin t - 2 \sin^3 t,\] find \[\frac{d^2 y}{d x^2} \] ?


\[\text { If y } = a \left\{ x + \sqrt{x^2 + 1} \right\}^n + b \left\{ x - \sqrt{x^2 + 1} \right\}^{- n} , \text { prove that }\left( x^2 + 1 \right)\frac{d^2 y}{d x^2} + x\frac{d y}{d x} - n^2 y = 0 \]

Disclaimer: There is a misprint in the question,

\[\left( x^2 + 1 \right)\frac{d^2 y}{d x^2} + x\frac{d y}{d x} - n^2 y = 0\] must be written instead of

\[\left( x^2 - 1 \right)\frac{d^2 y}{d x^2} + x\frac{d y}{d x} - n^2 y = 0 \] ?


If x = 2aty = at2, where a is a constant, then find \[\frac{d^2 y}{d x^2} \text { at }x = \frac{1}{2}\] ?


If y = axn+1 + bx−n, then \[x^2 \frac{d^2 y}{d x^2} =\] 

 


If \[f\left( x \right) = \frac{\sin^{- 1} x}{\sqrt{1 - x^2}}\] then (1 − x)2 '' (x) − xf(x) =

 


If \[y = \frac{ax + b}{x^2 + c}\] then (2xy1 + y)y3 = 

 


Share
Notifications

Englishрд╣рд┐рдВрджреАрдорд░рд╛рдареА


      Forgot password?
Use app×