Declining estrogen levels can trigger severe pain in the lower lumbar region. The lower back pain due to estrogen deficiency can best be described as excruciating pain which radiates down the buttocks and legs. The incapacitating lower back pain may also hamper every day tasks.
A Position vector is a vector that describes position of a point in space. Often the position of such a point is nothing but the x,y, and z coordinates of the point with origin as the reference point. The direction of such a vector is the arrow or...
Vector Notation. One way to notate a vector is with coordinates (x,y,z). For example, the vector v = (3,-2,5) corresponds to a vector that starts at the origin (0,0,0) and ends at the point (3,-2,5). When we talk about the angle between two vectors, we think of them as both extending from the origin. vector is a quantity with magnitude and direction. For example a wind speed vector says how fast the wind is blowing, as well as in what direction. The easiest way to calculate the angle between two different vectors is by using the dot product.