The CSC function returns the cosecant of an angle.
Cosecant is widely used in trigonometry and other engineering sciences.
Syntax
CSC(angle)
Argument |
Description |
Permitted values |
|---|---|---|
angle |
Angle in radians for which the cosecant is calculated |
Any real number except n × π (where n is an integer) |
Examples of use
Simple calculation
=CSC(PI()/6)
This formula will return 2, since the cosecant of 30° (or π/6 radians) is equal to 2.
Use with a negative value
=CSC(-PI()/4)
This formula will return −π/2 (approximately −1.414), since the cosecant of −45° is equal to −π/2.
Checking values where sine equals zero
If you try to use an angle where the sine is zero, for example:
=CSC(PI())
You will get an incorrect value because the cosecant is undefined for such angles.
Notes
It is important to remember that the CSC function is not defined for angles where the sine is zero, since the cosecant tends to infinity at these points.