Solve cos’t + cos2t + 1=0. Statements: 1. The equation 3cos?t = 0 may be used to solve the equation. %3D 2. The equation cos't + 2cost + 1 = 0 may be used to solve the equation. 3. t = T/2 + nk, where k = 0, ±1, ±2, ±3... 4. t = n + 2nk, where k = 0, ±1, ±2, ±3... O 1 & 3 only 2 & 4 only 2 & 3 & 4 only All statements are correct

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