(Sorry for the bad title wording.)
I attached a picture of what I mean. Those are two points, each attached to a different voltage source. I'm used to seeing something like +9 [V] to 0 [V].
1) How am I supposed to interpret a circuit with a -X [V], where X = any positive integer, at the end...
x^{5}+y^{5}
=x^{3}x^{2}+y^{3}y^{2}
=(x^{2}x+y^{2}y)(x^{4}x^{2}-x^{2}xy^{2}y+y^{4}y^{2})
=(x+y)(x^{2}-xy+y^{2})(x^{6}-x^{3}y^{3}+y^{6})
=(x+y)(x^{8}-x^{5}y^{3}+x^{2}y^{6}-x^{7}y+x^{4}y^{3}-xy^{7}+x^{6}y^{2}-x^{3}y^{5}+y^{8})
What am I doing wrong?
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Your...
Homework Statement
For a sinusoidal wave:
At a certain instant, let point A be at the origin and point B be the first point along the x-axis where the wave is 60.0° out of phase with point A. What is the coordinate of point B?
y = (15.0 cm) cos(0.157x - 50.3t)
Homework EquationsThe Attempt...
x is a unit vector \in \Re^{2}. My textbook states that \frac{x}{||x||}=\frac{1}{||x||}x. What is the point of including \frac{1}{||x||}; why do they divide the vector by its length?
Edit: I just looked at a book in Google's database, and from what I understand:
e.g. \sqrt{{2^2+2^2+1^2}}=3...