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Find the Value of cos 36^@ or sin 54^@...

Find the Value of cos `36^@` or sin `54^@`

A

`(sqrt(5)-1)/(4)`

B

`(sqrt(5)+1)/(4)`

C

`(sqrt(10+2sqrt(5)))/(4)`

D

`(sqrt(10-2sqrt(5)))/(4)`

Text Solution

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The correct Answer is:
B
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