Sin 19 Degrees

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

What is sin 19°?

Answer

sin 19° ≈
0.3256

Angle in radians: 19° = 19π/180. The point of the angle is in quadrant I, where sine is positive.

≈ — rounded to 4 decimal places. sin 19° can't be written with square roots: 19° is not a multiple of 3°.

P(cos 19°, sin 19°) ≈ (0.9455, 0.3256)

xyOP

P(cos 19°, sin 19°) ≈ (0.9455, 0.3256)

Highlighted: the projection on the y-axis — sine, y ≈ 0.3256.

All four functions of 19°
FunctionExact valueDecimal
sin 19°—≈ 0.3256
cos 19°—≈ 0.9455
tan 19°—≈ 0.3443
cot 19°—≈ 2.9042

See Also

Recalculate with different values ↑

Sine of nearby angles

Anglesin
16°≈ 0.2756
17°≈ 0.2924
18°(√5 − 1)/4
19°≈ 0.3256
20°≈ 0.3420
21°≈ 0.3584
22°≈ 0.3746

FAQ

What is sin 19°?

sin 19° ≈ 0.3256

Why does sin 19° 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°. 19° is not, so no such exact form exists; the value is used as a decimal: sin 19° ≈ 0.3256.

Why does a calculator show 0.1499 for sin 19?

The calculator is in radian mode (RAD): it takes sin 19 as the sine of 19 radians, sin 19 rad ≈ 0.1499. Switch it to degrees (DEG): sin 19° ≈ 0.3256. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

See Also