1.

Iftan 20^(@) = lambda , " then " (tan 250^@ + tan 340^(@))/(tan 200^(@) - tan 110^(@))=

Answer»

`(1+lambda^(2))/(1-lambda^(2))`
`(1-lambda^(2))/(1+lambda^(2))`
`(1+lambda^(2))/(2lambda)`
`(1-lambda^(2))/(2lambda)`

ANSWER :B


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