1.

The general solution of the equation 7 cos2 x+3 sin2 x=4 is(a) x=2 nπ±π6, n ∈ Z(b) x=2 nπ±2π3, n ∈ Z(c) ​x=nπ±π3, n ∈ Z(d) none of these

Answer» The general solution of the equation 7 cos2 x+3 sin2 x=4 is

(a) x=2 nπ±π6, n Z



(b) x=2 nπ±2π3, n Z



(c) ​x=nπ±π3, n Z



(d) none of these


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