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Find the length of the tangent from P to...

Find the length of the tangent from P to the circle S=0 when
(i) `P(-2,5)` and `S=x^(2)+y^(2)-25`
(ii) `P(0,0)` and `S=x^(2)+y^(2)-14x+2y+25`
(iii) `P=(2,5)` and `S=x^(2)+y^(2)-5x+4y-5`
(iv) `P=(12,17)` and `S=x^(2)+y^(2)-6x-8y-25`
(v) `P=(1,3)` and `S=x^(2)+y^(2)-2x+4y-11`

Text Solution

Verified by Experts

The correct Answer is:
(i) 2 (ii) 5 (iii) `sqrt(34)`
(iv) 10 (v) 3
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