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if vectors x and y are each of length of 3 units i.e x=y=3 if x + y=sqrt 17
what is x - y

i used the cosine law to figure out the angle for x +y and now i plan on subbing in the angle to find out what x - y is....is that correct? and what would be the cosine formula for x-y?
thank you!

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We have:
x = cos(t)
y=sin(t)
z=5t

Deduce the acceleration along the trajectory

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Home >All Categories > Science & Mathematics >Mathematics >Open Question Kemedi Nkwe Member since:December 29, 2006Total points:185 (Level 1)The question goes like this: " Write u = 8i + 4j - 12k as the sum of a vector parallel to v = i + 2j - k "
I really don't understand what this question wants!!! There is no way you can u in terms of v!!! Any help will be appreciated,Answer Question

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Home >All Categories > Science & Mathematics >Physics >Open Question Eric Member since:January 08, 2011Total points:97 (Level 1)True or False. A,B,C,D are all vectors in the 3D plane. (((A x B) x C) · D) is a "meaningless" equation. This question was on my final. Any ideas?Answer Question

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