I have homework and I’m so lost. Here is a link to the image to which the questions apply:
http://s291.photobucket.com/albums/ll306/Jessica_K…
a) What is the xcomponent of vector E of the figure in terms of the angle theta and the magnitude E?
b) What is the ycomponent of vector E of the figure in terms of the angle theta and the magnitude E?
c) For the same vector, what is the xcomponent in terms of the angle phi and the magnitude E?
d) For the same vector, what is the ycomponent in terms of the angle phi and the magnitude E?
Express answer in terms of the variables phi and E
1 Answer

A) Ex = Ecos(theta)
B) Ey = +E*sin(theta)
C) Ex = E*sin(phi)
D) Ey = +E*cos(phi)
This problem is nothing more than a simple vector component production problem. All you need is a simple understanding of how the trigonometry functions were each defined.