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Value of (cos 12^0+s in 12^0)/(cos 12^0-...

Value of `(cos 12^0+s in 12^0)/(cos 12^0-s in 12^0)` is equal to `t a n 417^0` b. `t a n 237^0` c. `t a n 57^0` d. ` t a n 663^0`

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