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ICSE Class 10 Answered

Pls answer the question on Circles

Thanks.

Asked by birpori | 04 Nov, 2018, 02:34: PM
Expert Answer
Join OD
OD = OA .....radii
so in triangle AOD
angle ODA = angle OAD = x
so angle COD = 2x......exterior angle
so in triangle COD 
OD perpendicular to DC......tangent radius
angle DCB = 90-2x
 
now join BD
angle DBC is exterior angle of tri ABD
also  angle ADB = 90, angle subtended by diameter
so angle DBC = 90 + x
Answered by Arun | 06 Nov, 2018, 09:56: AM
ICSE 10 - Maths
Asked by birpori | 04 Nov, 2018, 02:34: PM
ANSWERED BY EXPERT
ICSE 10 - Maths
Asked by Jatinaa786 | 17 Feb, 2018, 05:48: PM
ANSWERED BY EXPERT
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