**Cos 90 0 Artinya**. Cos x = adjacent side / hypotenuse. Hey there, I recently started working with mathjs and I seriously love this library.

So we can see here that cosecant is the co-function of secant. As you might have noticed, cosecant has a 'co' written in front of ''secant'. Hey there, I recently started working with mathjs and I seriously love this library.

### Cos x = adjacent side / hypotenuse.

So we can see here that cosecant is the co-function of secant.

Hey there, I recently started working with mathjs and I seriously love this library. To define the cosine function of an acute angle, we will consider the right angle triangle with an angle of interest and the sides of a triangle. Let a rotating line OA rotates about O in the anti-clockwise direction, from initial position to ending position makes an angle ∠XOA = θ again the same rotating line rotates in the same direction and.