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STATEMENT-1 : From point (4, 0) three di...

STATEMENT-1 : From point (4, 0) three different normals can be drawn to the parabola `y^(2) =4x.`
and
STATEMENT-2 : From any point, atmost three different normals can be drawn to a hyperbola.

A

Statement-1 is true, statement-2 is true, Statement -2 is a correct explanation for Statement -1

B

Statement -1 is true, Statement-2 is true , Statement-2 is NOT a correct explanation for statement-1

C

Statement-1 is true, Statement-2 is False

D

Statement-1 is False, Statement-2 is true

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we need to analyze both statements regarding the normals drawn from a point to a parabola and a hyperbola. ### Step 1: Analyze Statement 1 We need to determine if three different normals can be drawn from the point (4, 0) to the parabola given by the equation \( y^2 = 4x \). 1. **Identify the parameters of the parabola**: The equation \( y^2 = 4x \) is in the standard form of a parabola \( y^2 = 4ax \), where \( a = 1 \). 2. **Determine the point from which normals are drawn**: The point is \( (4, 0) \), so \( k = 4 \). 3. **Check the condition for drawing three normals**: The condition for three normals to be drawn from a point \( (k, 0) \) to the parabola is that \( k > 2a \). - Here, \( 2a = 2 \times 1 = 2 \). - Now, check if \( k > 2a \): \[ 4 > 2 \quad \text{(True)} \] Since this condition is satisfied, we can conclude that three different normals can indeed be drawn from the point (4, 0) to the parabola. ### Conclusion for Statement 1: **Statement 1 is true**. --- ### Step 2: Analyze Statement 2 We need to determine the maximum number of normals that can be drawn from any point to a hyperbola. 1. **Consider the general form of a hyperbola**: The standard form of a hyperbola is given by: \[ \frac{x^2}{a^2} - \frac{y^2}{b^2} = 1 \] 2. **Equation of the normal to the hyperbola**: The equation of the normal at a point on the hyperbola can be expressed as: \[ a \cos \theta \cdot x + b \cot \theta \cdot y = a^2 + b^2 \] where \( \theta \) is the angle corresponding to the point on the hyperbola. 3. **Determine the number of normals**: If we are drawing normals from a point \( (h, k) \), we substitute these values into the normal equation: \[ a \cos \theta \cdot h + b \cot \theta \cdot k = a^2 + b^2 \] 4. **Transform the equation**: By substituting \( \cos \theta \) and \( \cot \theta \) in terms of a parameter \( t \) (where \( t = \tan(\theta/2) \)), we can derive a polynomial equation in \( t \). 5. **Degree of the polynomial**: The resulting equation will be a polynomial of degree 4. A polynomial of degree 4 can have at most 4 real roots, which means that there can be at most 4 normals drawn from any point to the hyperbola. ### Conclusion for Statement 2: **Statement 2 is false** because the maximum number of normals that can be drawn from any point to a hyperbola is 4. --- ### Final Conclusion: - **Statement 1 is true**. - **Statement 2 is false**. Thus, the correct answer is that Statement 1 is true and Statement 2 is false. ---
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