Home
Class 12
MATHS
The value of lim(xrarr(pi)/(3))(2-sqrt3s...

The value of `lim_(xrarr(pi)/(3))(2-sqrt3sinx-cosx)/((3x-pi)^(2))` is equal to the reciprocal of the number

Text Solution

AI Generated Solution

The correct Answer is:
To solve the limit problem, we will follow these steps: ### Step 1: Write the limit expression We start with the limit expression: \[ \lim_{x \to \frac{\pi}{3}} \frac{2 - \sqrt{3} \sin x - \cos x}{(3x - \pi)^2} \] ### Step 2: Simplify the numerator We can rewrite the numerator: \[ 2 - \sqrt{3} \sin x - \cos x = 2 - 2 \left(\frac{\sqrt{3}}{2} \sin x + \frac{1}{2} \cos x\right) \] Using the identity \( \cos(a - b) = \cos a \cos b + \sin a \sin b \), we can express: \[ \frac{\sqrt{3}}{2} = \cos\left(\frac{\pi}{3}\right) \quad \text{and} \quad \frac{1}{2} = \sin\left(\frac{\pi}{3}\right) \] Thus, we can write: \[ 2 - 2 \left(\frac{\sqrt{3}}{2} \sin x + \frac{1}{2} \cos x\right) = 2(1 - \cos(x - \frac{\pi}{3})) \] ### Step 3: Substitute into the limit Now substituting this back into our limit gives: \[ \lim_{x \to \frac{\pi}{3}} \frac{2(1 - \cos(x - \frac{\pi}{3}))}{(3x - \pi)^2} \] ### Step 4: Change of variable Let \( t = x - \frac{\pi}{3} \). Then as \( x \to \frac{\pi}{3} \), \( t \to 0 \). We also have: \[ 3x - \pi = 3\left(t + \frac{\pi}{3}\right) - \pi = 3t \] Thus, our limit becomes: \[ \lim_{t \to 0} \frac{2(1 - \cos t)}{(3t)^2} = \lim_{t \to 0} \frac{2(1 - \cos t)}{9t^2} \] ### Step 5: Use the standard limit We know that: \[ \lim_{t \to 0} \frac{1 - \cos t}{t^2} = \frac{1}{2} \] Therefore, we can substitute this into our limit: \[ \lim_{t \to 0} \frac{2(1 - \cos t)}{9t^2} = \frac{2}{9} \cdot \frac{1}{2} = \frac{1}{9} \] ### Conclusion Thus, we find: \[ \lim_{x \to \frac{\pi}{3}} \frac{2 - \sqrt{3} \sin x - \cos x}{(3x - \pi)^2} = \frac{1}{9} \] The problem states that this limit is equal to the reciprocal of a number, which means: \[ \frac{1}{9} = \frac{1}{N} \implies N = 9 \] ### Final Answer The value of the limit is equal to the reciprocal of the number \(9\). ---
Promotional Banner

Topper's Solved these Questions

  • NTA JEE MOCK TEST 47

    NTA MOCK TESTS|Exercise MATHEMATICS|25 Videos
  • NTA JEE MOCK TEST 49

    NTA MOCK TESTS|Exercise MATHEMATICS|25 Videos

Similar Questions

Explore conceptually related problems

Evaluate lim_(xrarr(pi)/(6))((sqrt3sinx-cosx))/((x-(pi)/(6))).

The value of lim_(xrarr(5pi)/(4))(cot^(3)x-tanx)/(cos(x-(5pi)/(4))) is equal to

Evaluate lim_(xto(pi)/(6)) (2-sqrt(3)cosx-sinx)/((6x-pi)^(2)).

Evaluate lim_(xrarr(pi)/(4))((sinx-cosx))/((x-(pi)/(4))).

The value of lim_(xrarr(pi)/(6))(2cos(x+(pi)/(3)))/((1-sqrt3tanx)) is equal to

lim_(xrarr(pi)/(2)) (1-sinx)tanx=

The value of lim_(xrarr-pi)(|x+pi|)/(sinx)

Evaluate, lim_(xto(pi//6)) (sqrt(3)sinx-cosx)/(pi-pi/6)

The value of lim_(xrarr(3pi)/(4)) (1+root3(tanx))/(1-2cos^(2)x) is

lim_(x to (pi)/(6)) [(3sinx - sqrt(3)cos x)/(6x -pi)] is equal to

NTA MOCK TESTS-NTA JEE MOCK TEST 48-MATHEMATICS
  1. If y=x+c touches the ellipse 3x^(2)+4y^(2)=12 at the point P, then th...

    Text Solution

    |

  2. If f(x)={{:(a+cos^(-1)(x+b),":",xge1),(-x,":",xlt1):} is differentiabl...

    Text Solution

    |

  3. If x in (0,pi/2), then show that cos^(-1)(7/2(1+cos2x)+sqrt((sin^2x-48...

    Text Solution

    |

  4. Two cyclists start from the junction of two perpendicular roads, there...

    Text Solution

    |

  5. The value of int((tan^(-1)(sinx+1))cosx)/((3+2sinx-cos^(2)x))dx is (wh...

    Text Solution

    |

  6. The number of polynomials of the form x^(3)+ax^(2)+bx+c that are divis...

    Text Solution

    |

  7. If the circle x^(2)+y^(2)-10x+16y+89-r^(2)=0 and x^(2)+y^(2)+6x-14y+42...

    Text Solution

    |

  8. The differential equation of the family of curves whose tangent at any...

    Text Solution

    |

  9. The length of two opposite edges of a tetrahedron are 12 and 15 units ...

    Text Solution

    |

  10. If 4 distinct numbers are chosen randomly from the first 100 natural n...

    Text Solution

    |

  11. If the system of equations x-ky+3z=0, 2x+ky-2z=0 and 3x-4y+2z=0 ha...

    Text Solution

    |

  12. The statement (~(phArr q))^^p is equivalent to

    Text Solution

    |

  13. Mid point of A(0, 0) and B(1024, 2048) is A1. mid point of A1 and B ...

    Text Solution

    |

  14. In ten observation, the mean of all 10 numbers is 15, the mean of the ...

    Text Solution

    |

  15. If A is a non - null diagonal matrix of order 3 such that A^(4)=A^(2),...

    Text Solution

    |

  16. If 53^(53)-33^(3) is divided by 10, then the remainder obtained is

    Text Solution

    |

  17. Let tangent PQ and PR are drawn from the point P(-2, 4) to the parabol...

    Text Solution

    |

  18. The value of lim(xrarr(pi)/(3))(2-sqrt3sinx-cosx)/((3x-pi)^(2)) is equ...

    Text Solution

    |

  19. Consider f(x)= minimum (x+2, sqrt(4-x)), AA x le 4. If the area bounde...

    Text Solution

    |

  20. If the length of the projection of the line segment joining the points...

    Text Solution

    |