anonymous
  • anonymous
vectors
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
|dw:1378453346662:dw|
anonymous
  • anonymous
|dw:1378453509606:dw|
anonymous
  • anonymous
So if we say \[ \mathbf v = \langle x, y,z \rangle \]Then \[ \mathbf v = \langle 500\sin(50^\circ), 500\cos(50^\circ),20 \rangle \]

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anonymous
  • anonymous
They probably want you to calculate out those angles though.
anonymous
  • anonymous
So if we say \[ \mathbf v = \langle x, y,z \rangle \]Then \[ \mathbf v = \langle -500\sin(50^\circ), 500\cos(50^\circ),20 \rangle \]
anonymous
  • anonymous
500 sin(50) = 383 500 cos(50) = 321
anonymous
  • anonymous
|dw:1378453670642:dw|
anonymous
  • anonymous
v = <383 miles,321 miles,20 miles>
anonymous
  • anonymous
Do you understand how I got it?
anonymous
  • anonymous
ya the triangle using trig
anonymous
  • anonymous
why is sin negative tho
anonymous
  • anonymous
|dw:1378453944079:dw| \(x\) is going in a negative direction.
anonymous
  • anonymous
By the way, we're assuming the earth is flat.
anonymous
  • anonymous
ohk...so the components of displacement would be <-500sin(50), 500cos(50), 20> right
anonymous
  • anonymous
and i still can't get why is sin negative
anonymous
  • anonymous
Because west is the negative x direction and east is the positive x direction.
anonymous
  • anonymous
oh ya...thanks for reminding...and thanks for solution

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