The complete solution of the equation 7c...

The complete solution of the equation `7cos^2x+sinxcosx-3=0` is given by (a) `npi+pi/2;(n in I)` (b) `npi-pi/4;(n in I)` (c) `npi+tan^(-1)\ 4/3;(n in I)` (d) `npi+3pi\ ,\ kpi+tan^(-1)\ 4/3;(n , k in I)`

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