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36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me

Meee i honestly dont know what this question talking about