AP EAMCET · Maths · Circle
Find the equations of the tangents drawn to the circle at the points where the line meets it.
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
Given circle x2+y2 = 50, line x+7=0 ⇒49+y2=50 ⇒y2=1 So point of intersection is -7, ±1 Equation of tangent at x1, y1 is xx1+yy1=r2 ⇒-7x±y = 50 So required equations are 7x+y+50=0 & 7x-y+50=0.
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