Advertisements
Advertisements
Question
If y = `sqrt(sinx + y)`, then `"dy"/"dx"` is equal to ______.
Options
`cos/(2y - 1)`
`cosx/(1 - 2y)`
`sinx/(1 - 2y)`
`sinx/(2y - 1)`
Advertisements
Solution
If y = `sqrt(sinx + y)`, then `"dy"/"dx"` is equal to `cos/(2y - 1)`.
Explanation:
Given that: y = `sqrt(sinx + y)`
Differentiating both sides w.r.t. x
`"dy"/"dx" = 1/(2sqrt(sinx + y)) * "d"/"dx" (sin x + y)`
⇒ `"dy"/"dx" = 1/(2sqrt(sinx + y)) * (cos x + "dy"/"dx")`
⇒ `"dy"/"dx" = 1/(2y) * [cos x + "dy"/"dx"]`
⇒ `"dy"/"dx" = cosx/(2y) + 1/(2y) * "dy"/"dx"`
⇒ `"dy"/"dx" - 1/(2y) * "dy"/"dx" = cosx/(2y)`
⇒ `(1 - 1/(2y))"dy"/"dx" = cosx/(2y)`
⇒ `((2y - 1)/(2y)) "dy"/"dx" = cosx/(2y)`
⇒ `"dy"/"dx" = cosx/(2y) xx (2y)/(2y - 1)`
⇒ `"dy"/"dx" = cosx/(2y - 1)`
APPEARS IN
RELATED QUESTIONS
Differentiate the function with respect to x.
`sec(tan (sqrtx))`
Differentiate the function with respect to x.
`(sin (ax + b))/cos (cx + d)`
Differentiate the function with respect to x.
`2sqrt(cot(x^2))`
Differentiate the function with respect to x.
`cos (sqrtx)`
Prove that the function f given by f(x) = |x − 1|, x ∈ R is not differentiable at x = 1.
Differentiate the function with respect to x:
(3x2 – 9x + 5)9
Differentiate the function with respect to x:
`sin^(–1)(xsqrtx), 0 ≤ x ≤ 1`
Differentiate the function with respect to x:
`(cos^(-1) x/2)/sqrt(2x+7)`, −2 < x < 2
If (x – a)2 + (y – b)2 = c2, for some c > 0, prove that `[1+ (dy/dx)^2]^(3/2)/((d^2y)/dx^2)` is a constant independent of a and b.
If f(x) = |x|3, show that f"(x) exists for all real x and find it.
If y = `[(f(x), g(x), h(x)),(l, m,n),(a,b,c)]`, prove that `dy/dx = |(f'(x), g'(x), h'(x)),(l,m, n),(a,b,c)|`.
Discuss the continuity and differentiability of the
If y = tanx + secx, prove that `("d"^2y)/("d"x^2) = cosx/(1 - sinx)^2`
Differentiate `tan^-1 (sqrt(1 - x^2)/x)` with respect to`cos^-1(2xsqrt(1 - x^2))`, where `x ∈ (1/sqrt(2), 1)`
If u = `sin^-1 ((2x)/(1 + x^2))` and v = `tan^-1 ((2x)/(1 - x^2))`, then `"du"/"dv"` is ______.
| COLUMN-I | COLUMN-II |
| (A) If a function f(x) = `{((sin3x)/x, "if" x = 0),("k"/2",", "if" x = 0):}` is continuous at x = 0, then k is equal to |
(a) |x| |
| (B) Every continuous function is differentiable | (b) True |
| (C) An example of a function which is continuous everywhere but not differentiable at exactly one point |
(c) 6 |
| (D) The identity function i.e. f (x) = x ∀ ∈x R is a continuous function |
(d) False |
`sin sqrt(x) + cos^2 sqrt(x)`
(x + 1)2(x + 2)3(x + 3)4
`tan^-1 (secx + tanx), - pi/2 < x < pi/2`
`sec^-1 (1/(4x^3 - 3x)), 0 < x < 1/sqrt(2)`
`d/(dx)[sin^-1(xsqrt(1 - x) - sqrt(x)sqrt(1 - x^2))]` is equal to
If sin y = x sin (a + y), then value of dy/dx is
A particle is moving on a line, where its position S in meters is a function of time t in seconds given by S = t3 + at2 + bt + c where a, b, c are constant. It is known that at t = 1 seconds, the position of the particle is given by S = 7 m. Velocity is 7 m/s and acceleration is 12 m/s2. The values of a, b, c are ______.
The function f(x) = x | x |, x ∈ R is differentiable ______.
Prove that the greatest integer function defined by f(x) = [x], 0 < x < 3 is not differentiable at x = 1 and x = 2.
Differentiability determines whether a function has what at a particular point?
For \[v\ne0\], what is the derivative of \[\frac{u}{v}\]?
What is \[\frac{d}{dx}(x^n)\]?
What is \[\frac{d}{dx}(\cos x)\]?
If \[f\] is differentiable at \[c\], which limit equals \[f'(c)\]?
Which conclusion establishes that \[f\] is continuous at \[x=c\]?
Which statement correctly describes the converse of “differentiability implies continuity”?
When does a derivative exist?
