# Math Help - More vecs lol (I suck)

1. ## More vecs lol (I suck)

Vector A has y - component Ay = +12.0m A makes an angle 32.0 degrees counterclockwise from the + y - axis.

How do you do this more likely how do you draw this.

What is the x-component of vector A?

What is the magnitude of vector A?

2. ## Re: More vecs lol (I suck)

Edit: the questions it was asking

3. ## Re: More vecs lol (I suck)

Originally Posted by Oldspice1212
Vector A has y - component Ay = +12.0m A makes an angle 32.0 degrees counterclockwise from the + y - axis.

How do you do this more likely how do you draw this.

What is the x-component of vector A?

What is the magnitude of vector A?
So draw your Cartesian axes, and draw a vector that makes an angle of 32 degrees counterclockwise from the positive y axis. Make it so that it reaches up as high as 12 units on your y axis. Can you see the right angle triangle? Can you use trigonometry to evaluate the horizontal distance (x component) and the hypotenuse (magnitude)?

4. ## Re: More vecs lol (I suck)

First, since the angle is "counterclockwise from the positive y axis", the x component will be negative. Ignoring the sign, you have a right triangle with angle 32 degrees, "near side" of length 12, and "opposite side" of unknown length x. "Tan= Opposite side over near side" gives x/12= tan(32).

5. ## Re: More vecs lol (I suck)

For Ax I got 10.64m, is this right?

6. ## Re: More vecs lol (I suck)

Originally Posted by Oldspice1212
For Ax I got 10.64m, is this right?
I suggest you reread what HallsofIvy wrote, you'll know immediately that it is not quite right...

7. ## Re: More vecs lol (I suck)

Lol I just saw it, I got 7.5m for x.

8. ## Re: More vecs lol (I suck)

Originally Posted by Oldspice1212
Lol I just saw it, I got 7.5m for x.

-7.5?!

10. ## Re: More vecs lol (I suck)

Correct (to one decimal place at least)

Now try evaluating the hypotenuse, which is the magnitude of your vector...

10.60 :3

12. ## Re: More vecs lol (I suck)

Originally Posted by Oldspice1212
10.60 :3
If the hypotenuse is the longest side of a right angle triangle, and you already have a side that is 12m, how can the hypotenuse possibly be 10.6m?

13. ## Re: More vecs lol (I suck)

I'm sick I wasn't thinking, it's 14.15

14. ## Re: More vecs lol (I suck)

Originally Posted by Oldspice1212
I'm sick I wasn't thinking, it's 14.15
14.15m is correct.

15. ## Re: More vecs lol (I suck)

I love you, can I call you the riddler?

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