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AB is the diameter of a circle with cent...

AB is the diameter of a circle with centre O. The tangent at a point C on the circle meets AB produced at Q. If `angle CAB =42^@`, then what is the measure of `angle CQA`?
AB एक वृत्त का व्यास है जिसका केंद्र O है | वत्त पर स्थित एक बिंदु C से गुजरने वाली स्पर्श रेखा AB से Q पर मिलती है | यदि `angle CAB =42^@` है, तो `angle CQA` का मान क्या होगा ?

A

`5^@`

B

`7^@`

C

`6^@`

D

`17^@`

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