For any integer

MATHEMATICS · Single correct · AP · AP Precalculus · Trigonometric and Polar Functions · Trigonometric and Polar Functions

Problem

For any integer kk, the angle −90∘+360∘k-90^{\circ}+360^{\circ}k has its terminal side along the (a) positive yy-axis (b) negative xx-axis (c) positive xx-axis (d) negative yy-axis

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