Your is wrong.
.
Now fix up everything that follows.
Hey everybody I know I have been posting a lot and I am sorry, I just really want to be sure that I am doing my H.W. right and getting the right answers.
Vector A = <1,-4> and vector B = <5,7>
a) Find the vector C=2A-B
For C I got <-3,1>
b) Find the magnitude of C
For this I got /square root 10/
c) Find 'Theta' the direction of C such that 0degrees is 'less than or equal to' "theta" < 360 degrees.
d) Find the angle between the vectors A and B...
The first two I just need verification but the last two I couldn't get
If anybody can help me...thanks.
Jesus this is a great forum, you guys really help each other out. I thank you guys for helping me as well. I was actually wondering about why only the "1" had gotten multiplied by two and not the "-4". Anyways thanks guys for helping me!
But again, the last two I don't really know how even start...if you guys could give me any tips?
By last two I mean "C and D"
Have a look here: http://www.mathhelpforum.com/math-he...-tutorial.html
I don't know how you got this result but here is what I've done:For D). I got 77.2degrees....
Would that be right?
which yields
If you use absolute values you'll get an angle of
Everybody thanks so much, this is one question that I really didn't get at all.
But just for last verification
I got
A)= (-3,-15)=C
B) Magnitude=
C) Find , the direction of C such that I couldn't find this one, if someone has any last tips.
D) Angle between vectors A and B =
For some reason I just can't get this...could someone just tell me the answer, I hate asking but as you can see I do try to do the problems but this one I think I just need to see what to do in order to actually fully understand.
11.8 degrees can anybody verify this?
That is nearly the angle between the negative y-axis and the vector. But again: As long as you don't post your working we can't show you what you've done wrong and what you should do instead.
As ProveIt suggested draw the vector. The direction is determined by the angle between the positive x-axis and the vector, measured anti-clockwise.
The head of the vector (the point C(-3, -15)) is situated in the 3rd quadrant, thus the angle in question must be greater than 180°.
Use the indicated right triangle to calculate the angle :
Choose the correct result.