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(cos 9^(@) + sin 9^(@))/(cos 9^(@) - sin...

`(cos 9^(@) + sin 9^(@))/(cos 9^(@) - sin 9^(@))` equals

A

`tan 54^(@)`

B

`tan 36^(@)`

C

`tan 18^(@)`

D

None of these

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The correct Answer is:
A
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