Current location - Training Enrollment Network - Mathematics courses - What do you mean by sin, cos, tan, ctan and arctan in mathematics? How to calculate?
What do you mean by sin, cos, tan, ctan and arctan in mathematics? How to calculate?
In ABC species of right triangle, A and B represent right angles and C represents hypotenuse. Take angle a as an example.

So there are:

SinA: stands for sine. The ratio of the opposite side of angle α to the hypotenuse,

Sina = account

CosA: for cosine. The ratio of adjacent straight edges to the hypotenuse of angle α,

cosA=b/c

Tana: It means tangent. The ratio of the opposite side of angle A to the adjacent straight side, tana = a/b.

CtanA: indicates cotangent. The ratio of adjacent straight edges to opposite edges of Angle A, tana = b/a.

ArctanA: It means arc tangent.