Home › AP EAMCET › Mathematics › Coordinate Geometry: Direction Cosines and Direction Ratios › A vector makes angles with the three positive co…
A vector makes angles with the three positive coordinate axes. What are the cosines of these angles called?
ADirection ratios
BDirection cosines
CPosition ratios
DAxis intercepts
Answer & Solution
Correct answer: B. Direction cosines
Cosines of the angles a vector makes with the positive x, y and z axes are by definition its direction cosines.
Related questions
The convention for the angle theta between two vectors restricts it to which range?Unit vectors u and v have direction cosines (1/3, 2/3, 2/3) and (2/3, 1/3, -2/3). What is If l, m, n are direction cosines of a line, which relation always holds?For the vector (1, 2, 2), what is the direction cosine with respect to the z-axis?A vector has components 2, 3 and 6 along the axes. What is its direction cosine with the xDirection cosines give an easy way to represent which feature of a vector in Cartesian spaA line makes acute angles of 60 degrees with the x and y axes. Its angle with the z-axis iA line is perpendicular to both the x-axis and the y-axis. Its direction cosines are: