plzzz answer question 6th
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D is the right answer
Proof
OC=OA (radii of circle)
Angle OCA=Angle OAC
Angle OCA=Angle PAC - Angle POC.
110°-90°=20°
Tangent r perpendicular to radius
Angle OAC=20°
Angle BCA+BAC+CBA=180°
BCA+20°+90°=180°
Angle BCA=180-90-20
=70°
Proof
OC=OA (radii of circle)
Angle OCA=Angle OAC
Angle OCA=Angle PAC - Angle POC.
110°-90°=20°
Tangent r perpendicular to radius
Angle OAC=20°
Angle BCA+BAC+CBA=180°
BCA+20°+90°=180°
Angle BCA=180-90-20
=70°
anju50:
but you have done some mistakes
In 2 &3 last line it is CBA not BCA
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