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In a Delta ABC if angle A=90^@, then cos...

In a `Delta ABC` if `angle A=90^@`, then `cos^(-1)(( R)/(r_2 +r_3))` is equal

A

`90^(@)`

B

`30^(@)`

C

`60^(@)`

D

`45^(@)`

Text Solution

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The correct Answer is:
C
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