in fig 1 PA and PB are two tangents drawn from an external point P to a circle with Centre C and radius 4 cm if PA perpendicular PB then the length of each tangent is
a)3cm
b)4cm
c)5cm
d)6cm
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IN THE GIVEN QUESTION
ANGLE APB=90*
SO ANGLE CPB=45*
NOW IN TRIANGLE PCB
WE HAVE CB=4.
BP=?
SO
WE KNOW THAT IN TRIANGLE PCB
tan45*=P/B=BC/BP=4/BP
1=4/BP (AS tan45*=1)
SO BP=4CM
SO (B) IS THE CORRECT ONE
HOPE THIS WILL HELP YOU AND PLEASE MARK ME AS A BRAINLIST
ANGLE APB=90*
SO ANGLE CPB=45*
NOW IN TRIANGLE PCB
WE HAVE CB=4.
BP=?
SO
WE KNOW THAT IN TRIANGLE PCB
tan45*=P/B=BC/BP=4/BP
1=4/BP (AS tan45*=1)
SO BP=4CM
SO (B) IS THE CORRECT ONE
HOPE THIS WILL HELP YOU AND PLEASE MARK ME AS A BRAINLIST
thanx
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