Cos 82 Degrees

Sin, Cos, Tan, Cot of an Angle
Function
Angle (°)

What is cos 82°?

Answer

cos 82° ≈
0.1392

Angle in radians: 82° = 41π/90. The point of the angle is in quadrant I, where cosine is positive.

≈ — rounded to 4 decimal places. cos 82° can't be written with square roots: 82° is not a multiple of 3°.

P(cos 82°, sin 82°) ≈ (0.1392, 0.9903)

xyOP

P(cos 82°, sin 82°) ≈ (0.1392, 0.9903)

Highlighted: the projection on the x-axis — cosine, x ≈ 0.1392.

All four functions of 82°
FunctionExact valueDecimal
sin 82°—≈ 0.9903
cos 82°—≈ 0.1392
tan 82°—≈ 7.1154
cot 82°—≈ 0.1405

See Also

Recalculate with different values ↑

Cosine of nearby angles

Anglecos
79°≈ 0.1908
80°≈ 0.1736
81°≈ 0.1564
82°≈ 0.1392
83°≈ 0.1219
84°≈ 0.1045
85°≈ 0.0872

FAQ

What is cos 82°?

cos 82° ≈ 0.1392

Why does cos 82° have no exact value?

A trigonometric value of a whole number of degrees can be written with square roots only when the angle is a multiple of 3°. 82° is not, so no such exact form exists; the value is used as a decimal: cos 82° ≈ 0.1392.

Why does a calculator show 0.9497 for cos 82?

The calculator is in radian mode (RAD): it takes cos 82 as the cosine of 82 radians, cos 82 rad ≈ 0.9497. Switch it to degrees (DEG): cos 82° ≈ 0.1392. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

See Also