1.

( 2tan 30 ^(@) )/( 1+tan ^(2) 45^(@) ) =(a) sin60(b) cos60(c)tan30(d)sin30

Answer»

`sin 60^(@) `
` COS 60 ^(@) `
` tan 30^(@) `
` sin 30 ^(@) `

ANSWER :C


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