Cos 2 Degrees: Cosine of 2° on the Unit Circle

What is cos 2°?

Answer

cos 2° ≈

0.9994

Angle in radians: 2° = π/90. The point of the angle is in quadrant I, where cosine is positive.

≈ — rounded to 4 decimal places. cos 2° can't be written with square roots: 2° is not a multiple of 3°.

P(cos 2°, sin 2°) ≈ (0.9994, 0.0349)

Highlighted: the projection on the x-axis — cosine, x ≈ 0.9994.

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