math
Across
- 1. It is four regions divided by the horizontal and vertical axes in the plane rectangular coordinate system (Cartesian coordinate system). Each region is called a quadrant
- 3. The quotient of the distance between the vertex of an angle and another arbitrary point on the terminal edge of the angle divided by the non-zero ordinate of the next point
- 7. The ratio of the hypotenuse to the adjacent edge of an acute angle is called the secant of the acute angle
- 8. The vertex coincides with the origin of the plane rectangular coordinate system, and the initial edge of the angle coincides with the positive x axis
- 9. The abscissa of any point on the end edge of any corner except the vertex divided by the non-zero ordinate of the point
Down
- 2. the angle between the terminal arm of an angle in standard position and the x-axin
- 4. the counterclockwise angle between the initial arm and the terminal arm
- 5. When the vertex of an angle coincides with the origin of the plane rectangular coordinate system, and the starting edge of the angle coincides with the positive direction of the X axis
- 6. The vertex of this angle coincides with the origin of the plane rectangular coordinate system, and its starting edge coincides with the positive x axis