What is the sin cos tan degree formula of neighbors?

Comparison between Sin, cos and tan degree formulas and neighbors;

1, sin (sine) is the hypotenuse of the opposite side.

2.cos (cosine) is the hypotenuse of the adjacent side.

3, tan (tangent) is the opposite side than the adjacent side.

Tan commonly used formula: tan a = Sina/cos a；; tanα= 1/cotα.

1. Let α be an arbitrary angle, and the values of the same trigonometric function with the same terminal angle are equal: tan(2kπ+α)=tanα.

2. Let α be an arbitrary angle, and the relationship between π+α and the trigonometric function value of α is tan(π+α)=tanα.

3. The relationship between arbitrary angle α and trigonometric function value of-α: tan (-α) =-tan α.

4. Using Formula 2 and Formula 3, we can get the relationship between the trigonometric function values of π-α and α: tan (π-α) =-tan α.

5. Using formula 1 and formula 3, we can get the relationship between the trigonometric function values of 2π-α and α: tan (2π-α) =-tan α.