sin0 = 0sin 90 = 1； sin 180 = 0； sin 270 =- 1； sin 360 = 0；

cos 0 = 1； cos 90 = 0； cos 180 =- 1； cos 270 = 0； cos 360 = 1；

tan0 = 0tan 90 = 1； tan 180 = 0； tan 360 = 0； Tan270 does not exist, 270? Is not the domain of tan function.

Data expansion:

1, trigonometric function is one of the basic elementary functions. It takes the angle as the independent variable, and the angle corresponds to the coordinates of the intersection of the terminal edge of any angle and the unit circle or its ratio as the dependent variable.

2. Common trigonometric functions include sine function, cosine function and tangent function.

Reference: Trigonometric Function _ Baidu Encyclopedia