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PAT is a tangent to a circle at a point ...

PAT is a tangent to a circle at a point A on it , and AB is a chord such that, `angle BAT= 72^@`. If C is a point on the circle such that `angle CBA=58^@`, then what is the measure of `angle CAB` ?
PAT एक वृत्त के बिंदु A से इस पर खींची गयी स्पर्श रेखा है तथा AB एक ऐसी जीवा है कि `angle BAT= 72^@` यदि C वृत्त पर स्थित ऐसा बिंदु है कि `angle CBA=58^@` है, तो `angle CAB` का मान ज्ञात करें |

A

`50^@`

B

`62^@`

C

`48^@`

D

`60^@`

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