1.

If Tan theta_(1)=k cot theta_(2) then(cos (theta_(1)+theta_(2)))/(cos (theta_(1)-theta_(2)))=

Answer»

`(1+k)/(1-k)`
`(1-k)/(1+k)`
`(k+1)/(k-1)`
`(k-1)/(k+1)`

ANSWER :B


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