How can we find the solutions for an equation like 6 cos x = 2 in the interval 0 to 2π?

Patrick Ritchie asked Feb 13, 2023

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Patrick Ritchie asked Feb 13, 2023

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15 votes

Answer:

$x=\arccos(1/3), 2\pi-\arccos(1/3)$

Explanation:

$6\cos x=2 \\ \\ \cos x=1/3 \\ \\ x=\arccos(1/3), 2\pi-\arccos(1/3)$

Atafar answered Feb 19, 2023

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