Calculates the cofunction of the 6 trig functions:
* sin

* cos

* tan

* csc

* sec

* cot

This calculator has 1 input.

* cos

* tan

* csc

* sec

* cot

This calculator has 1 input.

- sin(θ) = cos(90 - θ)
- cos(θ) = sin(90 - θ)
- tan(θ) = cot(90 - θ)
- csc(θ) = sec(90 - θ)
- sec(θ) = csc(90 - θ)
- cot(θ) = tan(90 - θ)

For more math formulas, check out our Formula Dossier

- angle
- the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.
- cofunction
- trigonometric identities that show the relationship between trigonometric ratios pairwise (sine and cosine, tangent and cotangent, secant and cosecant).
- cofunction calculator
- cos
- cos(θ) is the ratio of the adjacent side of angle θ to the hypotenuse
- cot
- The length of the adjacent side divided by the length of the side opposite the angle. Also equals 1/tan(θ)
- csc
- the length of the hypotenuse divided by the length of the adjacent side. Also equals 1/sin(θ)
- gradian
- defined as one hundredth of the right angle. This is equal to π/200 or 9/10°
- radian
- a unit of plane angular measurement that is equal to the angle at the center of a circle subtended by an arc whose length equals the radius or approximately 180°/π ~ 57.3 degrees.
- sec
- the length of the hypotenuse divided by the length of the adjacent side. Also equals 1/cos(θ)
- sin
- sin(θ) is the ratio of the opposite side of angle θ to the hypotenuse
- tan
- the ratio of the opposite side to the adjacent side of a particular angle of the right triangle.