Cos 7 Degrees

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

What is cos 7°?

Answer

cos 7° ≈
0.9925

Angle in radians: 7° = 7π/180. The point of the angle is in quadrant I, where cosine is positive.

≈ — rounded to 4 decimal places. cos 7° can't be written with square roots: 7° is not a multiple of 3°.

P(cos 7°, sin 7°) ≈ (0.9925, 0.1219)

xyOP

P(cos 7°, sin 7°) ≈ (0.9925, 0.1219)

Highlighted: the projection on the x-axis — cosine, x ≈ 0.9925.

All four functions of 7°
FunctionExact valueDecimal
sin 7°—≈ 0.1219
cos 7°—≈ 0.9925
tan 7°—≈ 0.1228
cot 7°—≈ 8.1443

See Also

Recalculate with different values ↑

Cosine of nearby angles

Anglecos
4°≈ 0.9976
5°≈ 0.9962
6°≈ 0.9945
7°≈ 0.9925
8°≈ 0.9903
9°≈ 0.9877
10°≈ 0.9848

FAQ

What is cos 7°?

cos 7° ≈ 0.9925

Why does cos 7° 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°. 7° is not, so no such exact form exists; the value is used as a decimal: cos 7° ≈ 0.9925.

Why does a calculator show 0.7539 for cos 7?

The calculator is in radian mode (RAD): it takes cos 7 as the cosine of 7 radians, cos 7 rad ≈ 0.7539. Switch it to degrees (DEG): cos 7° ≈ 0.9925. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

See Also