1.

If sin alpha+ cos alpha= m then sin^(6)( alpha)+ cos^(6) (alpha)=

Answer»

`(4-3(m^(2)-1)^(2))/(4)`
`(4-3(m^(2)-1)^(2))/(4)`
`(4+3(m^(2)+1)^(2))/(4)`
`(4+3(m^(2)+1)^(2))/(4)`

ANSWER :A


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