1.

If 2sin^(2)x-5sinxcosx-8cos^(2)x=-2 5 then

Answer»

`X={N pi +tan^(-1)(2),n inn Z}uu{n pi +tan^(-1)(-3/4),minZ}`
`x=npi+tan^(-1)(3),n in Z`
`x=n pi +tan^(-1)((-4)/3), n in Z`
`x=n pi +tan^(-1)(4),n in Z`

Answer :A


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