Cos 58 Degrees

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

What is cos 58°?

Answer

cos 58° ≈
0.5299

Angle in radians: 58° = 29π/90. The point of the angle is in quadrant I, where cosine is positive.

≈ — rounded to 4 decimal places. cos 58° can't be written with square roots: 58° is not a multiple of 3°.

P(cos 58°, sin 58°) ≈ (0.5299, 0.8480)

xyOP

P(cos 58°, sin 58°) ≈ (0.5299, 0.8480)

Highlighted: the projection on the x-axis — cosine, x ≈ 0.5299.

All four functions of 58°
FunctionExact valueDecimal
sin 58°—≈ 0.8480
cos 58°—≈ 0.5299
tan 58°—≈ 1.6003
cot 58°—≈ 0.6249

See Also

FAQ

What is cos 58°?

cos 58° ≈ 0.5299

Why does cos 58° 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°. 58° is not, so no such exact form exists; the value is used as a decimal: cos 58° ≈ 0.5299.

Why does a calculator show 0.1192 for cos 58?

The calculator is in radian mode (RAD): it takes cos 58 as the cosine of 58 radians, cos 58 rad ≈ 0.1192. Switch it to degrees (DEG): cos 58° ≈ 0.5299. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.