Sin 84 Degrees
Sin, Cos, Tan, Cot of an Angle
What is sin 84°?
Answer
sin 84° ≈
0.9945
Angle in radians: 84° = 7π/15. The point of the angle is in quadrant I, where sine is positive.
≈ — rounded to 4 decimal places. An exact form of sin 84° in square roots exists, but it is unwieldy — nested radicals.
P(cos 84°, sin 84°) ≈ (0.1045, 0.9945)
P(cos 84°, sin 84°) ≈ (0.1045, 0.9945)
Highlighted: the projection on the y-axis — sine, y ≈ 0.9945.
See Also
- Arcsin, Arccos, Arctan, Arccot - The angle from the value of its sine, cosine, tangent or cotangent: exact in degrees and π, with the check and the unit circle
- Square Root Calculator - Calculate the square root of any number
- Simplify Square Root Calculator - Write any square root in simplest radical form, step by step
- Geometry Formulas: Area, Volume, Perimeter - The formula for every standard shape, where it comes from, and worked examples
Sine of nearby angles
FAQ
What is sin 84°?
sin 84° ≈ 0.9945
Is there an exact value of sin 84°?
Yes: 84° is a multiple of 3°, and the values of such angles can be written with square roots — but the expression is unwieldy, with nested radicals built from the values of 18° and 15° (3° = 18° − 15°). In practice the decimal is used: sin 84° ≈ 0.9945.
Why does a calculator show 0.7332 for sin 84?
The calculator is in radian mode (RAD): it takes sin 84 as the sine of 84 radians, sin 84 rad ≈ 0.7332. Switch it to degrees (DEG): sin 84° ≈ 0.9945. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.
See Also
- Sin 74 Degrees: Sine of 74° on the Unit Circle
- Sin 75 Degrees: Sine of 75° on the Unit Circle
- Sin 76 Degrees: Sine of 76° on the Unit Circle
- Sin 77 Degrees: Sine of 77° on the Unit Circle
- Sin 78 Degrees: Sine of 78° on the Unit Circle
- Sin 79 Degrees: Sine of 79° on the Unit Circle
- Sin 80 Degrees: Sine of 80° on the Unit Circle
- Sin 81 Degrees: Sine of 81° on the Unit Circle
- Sin 82 Degrees: Sine of 82° on the Unit Circle
- Sin 83 Degrees: Sine of 83° on the Unit Circle
- Sin 85 Degrees: Sine of 85° on the Unit Circle
- Sin 86 Degrees: Sine of 86° on the Unit Circle
- Sin 87 Degrees: Sine of 87° on the Unit Circle
- Sin 88 Degrees: Sine of 88° on the Unit Circle
- Sin 89 Degrees: Sine of 89° on the Unit Circle
- Sin 90 Degrees: Sine of 90° on the Unit Circle
- Sin 97 Degrees: Sine of 97° on the Unit Circle
- Sin 98 Degrees: Sine of 98° on the Unit Circle
- Sin 100 Degrees: Sine of 100° on the Unit Circle
- Sin 101 Degrees: Sine of 101° on the Unit Circle
- Синус 84 градусов (sin 84°) на единичной окружности
- Seno de 84 grados (sen 84°) en el círculo unitario
- Seno de 84 graus (sen 84°) no ciclo trigonométrico