An angle measuring (525n)° is in standard position. For which value of n will the terminal side fall on the y-axis?

A terminal side lies on the y-axis when the angle is congruent to 90° or 270° modulo 360°. For n = 6, the angle is 525 × 6 = 3150°, and 3150° = 8 × 360° + 270°, so its terminal side lies on the y-axis. The correct choice is n = 6.

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