Question

Q. 5. Find the general solution of 4 cos²x = 1.​

Answer 1

Step-by-step explanation:

$4{ \cos }^{2} x = 1 \\ \\ \\ { \cos }^{2} x = \frac{1}{4} \\ \\ \\ \cos(x) = \frac{ + - 1}{2} \\ \\ \\ x = \frac{n\pi}{3}$

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