Prof never went over this in class, don't really know what to do..

Find the first three x-intercepts of the graph of the given function on the positive x-axis.

f(x) = 1 - 2cos(x+pi/3)

Any help (explanations, steps) would be great, thanks!

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Also... have a problem with this question..

Use the given information to find the values of the remaining five trigonometric functions.

cotx = 1/2, pi < x < 3pi/2

Thanks ><!