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STATEMENT-1 : The agnle between the tang...

STATEMENT-1 : The agnle between the tangents drawn from the point (6, 8) to the circle `x^(2) + y^(2) = 50` is `90^(@)`.
and
STATEMENT-2 : The locus of point of intersection of perpendicular tangents to the circle `x^(2) + y^(2) = r^(2)` is `x^(2) + y^(2) = 2r^(2)`.

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 given in the question. ### Step 1: Analyze Statement 1 We need to determine if the angle between the tangents drawn from the point (6, 8) to the circle defined by the equation \(x^2 + y^2 = 50\) is \(90^\circ\). 1. **Identify the Circle's Center and Radius**: - The given circle is \(x^2 + y^2 = 50\). - The center of the circle is at \((0, 0)\) and the radius \(r\) is \(\sqrt{50} = 5\sqrt{2}\). 2. **Calculate the Power of the Point**: - The power of a point \(P(x_1, y_1)\) with respect to a circle is given by: \[ \text{Power} = x_1^2 + y_1^2 - r^2 \] - For the point \(P(6, 8)\): \[ \text{Power} = 6^2 + 8^2 - 50 = 36 + 64 - 50 = 50 \] 3. **Length of Tangents**: - The length of the tangents \(L\) from the point \(P\) to the circle is given by: \[ L = \sqrt{\text{Power}} = \sqrt{50} = 5\sqrt{2} \] 4. **Using the Tangent Angle Formula**: - The angle \(\theta\) between the two tangents can be calculated using the formula: \[ \tan \theta = \frac{2LR}{L^2 - R^2} \] - Here, \(L = R = 5\sqrt{2}\): \[ L^2 = (5\sqrt{2})^2 = 50 \] - Therefore, the denominator becomes: \[ L^2 - R^2 = 50 - 50 = 0 \] - Since the denominator is zero, \(\tan \theta\) approaches infinity, which implies: \[ \theta = 90^\circ \] ### Conclusion for Statement 1: Thus, Statement 1 is **True**. ### Step 2: Analyze Statement 2 We need to verify if the locus of the point of intersection of perpendicular tangents to the circle \(x^2 + y^2 = r^2\) is given by \(x^2 + y^2 = 2r^2\). 1. **Understanding the Geometry**: - The tangents to the circle from a point \(P\) intersect at a right angle (90 degrees). - The center of the circle is at the origin \((0, 0)\). 2. **Finding the Locus**: - Let the point of intersection of the tangents be \(Q(x, y)\). - The distance from the center to the point \(Q\) must equal the radius \(r\) of the circle, and since the tangents are perpendicular, we can use the relationship: \[ OQ^2 = OP^2 + PQ^2 \] - The distance \(OQ\) is the radius of the circle, and \(OP\) is the distance from the center to the point from which the tangents are drawn. 3. **Using the Right Triangle**: - Since the tangents are perpendicular, we can derive that: \[ OQ^2 = OP^2 + OP^2 = 2(OP^2) \] - This gives us: \[ x^2 + y^2 = 2r^2 \] ### Conclusion for Statement 2: Thus, Statement 2 is also **True**. ### Final Conclusion: Both statements are true.
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