Points A and B are on a circle with centre O. PA and PB are

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Points A and B are on a circle with centre O. PA and PB are tangents to the circle from an external point P. If PA and PB are inclined to each other at 42^∘, then find the measure of ∠ OAB.

[SSC CGL 20th April 2022 Shift-1 With Answers]

A

21^∘

B

69^∘

C

42^∘

D

25^∘

EXPLANATION

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