Cos 5 Degrees: Cosine of 5° on the Unit Circle

What is cos 5°?

Answer

cos 5° ≈

0.9962

Angle in radians: 5° = π/36. The point of the angle is in quadrant I, where cosine is positive.

≈ — rounded to 4 decimal places. cos 5° can't be written with square roots: 5° is not a multiple of 3°.

P(cos 5°, sin 5°) ≈ (0.9962, 0.0872)

Highlighted: the projection on the x-axis — cosine, x ≈ 0.9962.

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