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himanshu

· started a discussion

· 1 Months ago

soln (Question: 202162.0 )

Question:

A, B and C are three points on a circle. From A point T, a tangent is drawn at 

A and a secant is drawn passing through B and C as shown in figure . If \(\angle \)BTA = 46º and \(\angle \)CAT = 48º, then the angle made by BC at the centre is –


Options:
A) 78º
B) 76º
C) 79º
D) 75º
Solution:
Ans: (b)


Sai Rao

· commented

· 1 Months ago

Angle OAT is 90 degrees (tangent makes an angle 90 degrees) and CAT is 48 degrees therefore OAC is 42 degrees then angle BAC must be greater than angle OAC
hence it should be morethan 42 degrees not 38 degrees
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