
2cos(xπ/6) = 1
let y = (xπ/6)
cos(y) = 1/2
y = π/3, π/3
substituting back the value of y,
(x  π/6) = π/3
x = π/2
(x  π/6) = π/3
x = π/6 or 11π/12
hope this helps~ :)posted by Jai
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