Cosecant Calculator – Calculate csc(x)
Find the cosecant of an angle using the csc calculator below. Start by entering the angle in degrees or radians.
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How to Find the Cosecant of an Angle
Cosecant is a trigonometric function abbreviated csc. Use the formula below to calculate the cosecant of an angle.
The cosecant formula is:
csc(α) = hypotenuse c / opposite a
Thus, the cosecant of angle α in a right triangle is equal to the length of the hypotenuse c divided by the opposite side a.
To solve csc, simply enter the length of the hypotenuse and opposite side, then solve.
This formula might look very similar to the formula to calculate sine. That’s because cosecant is the reciprocal of sine.
Cosecant should not be confused with arcsin, which is the inverse of the sine function. The difference being that cosecant is equal to 1 / sin(x), while arcsin is the inverse of the sine function.
csc(x) = 1 / sin(x) = sin(x)-1
arcsin(y) x where y = sin(x)
For example, let’s calculate the cosecant of angle α in a triangle with the length of the hypotenuse equal to 6 and the opposite side equal to 4.
csc(α) = 6 / 4
csc(α) = 3 / 2
If you graph the cosecant function for every possible angle, it forms a series of repeating U-curves.
One important property to note in the graph above is that the cosecant of an angle is never in the range of -1 to 1; it’s always smaller than or equal to -1 or larger than or equal to 1.
You’ll also notice that the curves never cross the x-axis at an even multiple of π radians, or 180°
The table below shows common angles and the csc value for each of them.
|Angle (degrees)||Angle (radians)||Cosecant|
|15°||π / 12||√6 + √2|
|30°||π / 6||2|
|45°||π / 4||√2|
|60°||π / 3||2√3 / 3|
|75°||5π / 12||√6 – √2|
|90°||π / 2||1|
|105°||7π / 12||√6 – √2|
|120°||2π / 3||2√3 / 3|
|135°||3π / 4||√2|
|150°||5π / 6||2|
|165°||11π / 12||√6 + √2|
|195°||13π / 12||-√6 – √2|
|210°||7π / 6||-2|
|225°||5π / 4||-√2|
|240°||4π / 3||–2√3 / 3|
|255°||17π / 12||√2 – √6|
|270°||3π / 2||-1|
|285°||19π / 12||√2 – √6|
|300°||5π / 3||–2√3 / 3|
|315°||7π / 4||-√2|
|330°||11π / 6||-2|
|345°||23π / 12||-√6 – √2|