1.

Ifsin ( theta + alpha ) = cos ( theta + alpha ), thentan theta =

Answer»

`(1+Tanalpha)/(1-Tanalpha)`
`(1+Sinalpha)/(1-Sinalpha)`
`(1-Tanalpha)/(1+Tanalpha)`
`(1+Cosalpha)/(1-Cosalpha)`

ANSWER :C


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