SIN Excel function is an inbuilt trigonometric function in excel which is used to calculate the sine value of given number or in terms of trigonometry the sine value of a given angle, here the angle is a number in excel and this function takes only a single argument which is the input number provided.

**Syntax**: =SIN (number)

The SIN function syntax has the following arguments:

**number**– The angle in radians for which you want the sine.

**Example**: Let’s look at some Excel SIN function examples and explore how to use the SIN function as a worksheet function in Microsoft Excel:

**Syntax**: =SIN(RADIANS(A2))

**Result**:

Based on the Excel spreadsheet above, the following SIN examples would return:

**Syntax**: =SIN(RADIANS(A3))

**Result**: 0.866025404

**Syntax**: =SIN(RADIANS(A4))

**Result**: 0.5

**Syntax**: =SIN(RADIANS(A5))

**Result**: 0.996194698

**Syntax**: =SIN(RADIANS(A6))

**Result**: 1

**Syntax**: =SIN(RADIANS(A7))

**Result**: 0.000000000

**Syntax**: =SIN(PI())

**Result**: 0.000000000

**Syntax**: =SIN(PI()/2)

**Result**: 1.000000000

**Syntax**: =SIN(30*PI()/180)

**Result**: 0.500000000

**Syntax**: =SIN(PI()/6)

**Result**: 0.500000000

**Syntax**: =SIN(-PI()/6)

**Result**: -0.500000000

**Syntax**: =SIN(-PI()/3)

**Result**: -0.866025404

**Syntax**: =SIN(0.85)

**Result**: 0.751280405

**Note**:

- The SIN function returns the sine of an angle provided in radians. In geometric terms, the sine of an angle returns the ratio of a right triangle’s opposite side over its hypotenuse. For example, the sine of PI()/6 radians (30°) returns the ratio 0.5. ( =SIN (PI()/6) returns 0.5).
- Convert the number as required in Radian or Degree using either RADIANS function or DEGREES function .
- You can use PI() function to get exact results of SIN function while working with π.