1.

If 7cos^(2)x+sinx cos x-3=0 then x=

Answer»

`x=N pi+(pi)/4, n inZ`
`x=kpi+tan^(-1)(4/3), k in Z`
`x=kpi+tan^(-1)(3/4), k in Z`
`x=npi+(pi)/3, n in Z`

ANSWER :B::C


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