1.

Find the equation of pair of tangents from (i) (0,0) to the circle x^(2)+y^(2)+10x+10y+40=0 (ii) (4,10) to the circle x^(2)+y^(2)=25 (iii) (3,2) to the circle x^(2)+y^(2)-6x+4y-2=0 (iv) (10,4) to the circle x^(2)+y^(2)=25 (v) (1,3) to the circle x^(2)+y^(2)-2x+4y-11=0

Answer»


ANSWER :(i) 0 (ii) 0 (iii) 0 (iv) 0 (iv) `0, cos^(-1)(7/25)`


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