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If (r2 -r1 ) = 2r2r3 " then " angle A ...

If ` (r_2 -r_1 ) = 2r_2r_3 " then " angle A = `

A

` 60 ^(@) `

B

` 90 ^(@) `

C

` 30 ^(@) `

D

` 45 ^(@) `

Text Solution

Verified by Experts

The correct Answer is:
B
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