Sin 47 Degrees

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

What is sin 47°?

Answer

sin 47° ≈
0.7314

Angle in radians: 47° = 47π/180. The point of the angle is in quadrant I, where sine is positive.

≈ — rounded to 4 decimal places. sin 47° can't be written with square roots: 47° is not a multiple of 3°.

P(cos 47°, sin 47°) ≈ (0.6820, 0.7314)

xyOP

P(cos 47°, sin 47°) ≈ (0.6820, 0.7314)

Highlighted: the projection on the y-axis — sine, y ≈ 0.7314.

All four functions of 47°
FunctionExact valueDecimal
sin 47°—≈ 0.7314
cos 47°—≈ 0.6820
tan 47°—≈ 1.0724
cot 47°—≈ 0.9325

See Also

FAQ

What is sin 47°?

sin 47° ≈ 0.7314

Why does sin 47° 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°. 47° is not, so no such exact form exists; the value is used as a decimal: sin 47° ≈ 0.7314.

Why does a calculator show 0.1236 for sin 47?

The calculator is in radian mode (RAD): it takes sin 47 as the sine of 47 radians, sin 47 rad ≈ 0.1236. Switch it to degrees (DEG): sin 47° ≈ 0.7314. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.