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(cos9^@+sin9^@)/(cos9^@-sim9^@)= (a) tan...

`(cos9^@+sin9^@)/(cos9^@-sim9^@)=` (a) `tan 54^@` (b) `tan 36^@` (d) None of these (c) `tan18^@`

A

tan `54^@`

B

tan `36^@`

C

tan `18^@`

D

tan`9^@`

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A
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(cos9^(@)+sin9^(@))/(cos9^(@)-sin9^(@))=(a)tan54^(@)(b)tan36^(@)(d) None of these (c)tan18^(@)

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