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OpenStudy (anonymous):
I seriously need someone to help me! Describe the vector as an ordered pair. Round the coordinates to the nearest tenth <–58.1, 50.5> <–102, 117.4> <–117.4, 102> <–50.5, 58.1>
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OpenStudy (anonymous):
jimthompson5910 (jim_thompson5910):
Hint: x = r*cos(theta) y = r*sin(theta)
jimthompson5910 (jim_thompson5910):
what is r
jimthompson5910 (jim_thompson5910):
it's the length of the vector
OpenStudy (anonymous):
okay so 77?
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jimthompson5910 (jim_thompson5910):
yes
jimthompson5910 (jim_thompson5910):
the angle theta is how much you've rotated the vector (starting at the positive x axis)
jimthompson5910 (jim_thompson5910):
and going counterclockwise
OpenStudy (anonymous):
okay?
jimthompson5910 (jim_thompson5910):
so how much is this rotation
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jimthompson5910 (jim_thompson5910):
theres the xy axis |dw:1356135100225:dw|
jimthompson5910 (jim_thompson5910):
add on the vector |dw:1356135118733:dw|
jimthompson5910 (jim_thompson5910):
what is this angle of rotation |dw:1356135144073:dw|
OpenStudy (anonymous):
139 degrees?
jimthompson5910 (jim_thompson5910):
|dw:1356135230368:dw|
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