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A unit circle diagram showing the point (0, 1) at the angle 90 degrees or pi/2 radians.

A unit circle diagram showing the point (0, 1) at the angle 90 degrees or pi/2 radians.

The angle 90°, or 𝜋/2 in radians. On the unit circle, 90° points straight up. The point at 90° is (0, 1). See more

#mathematics #geometry #trigonometry #technical illustration

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