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Dels vectors <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mover accent=¨true¨»«mi»u«/mi»«mo»§#8594;«/mo»«/mover»«mo»§nbsp;«/mo»«mi»i«/mi»«mo»§nbsp;«/mo»«mover accent=¨true¨»«mi»v«/mi»«mo»§#8594;«/mo»«/mover»«/math»</span> sabem que compleixen <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mover accent=¨true¨»«mi»u«/mi»«mo»§#8594;«/mo»«/mover»«mo»+«/mo»«mover accent=¨true¨»«mi»v«/mi»«mo»§#8594;«/mo»«/mover»«mo»=«/mo»«mover accent=¨true¨»«mi»a«/mi»«mo»§#8594;«/mo»«/mover»«mo»,«/mo»«mo»§nbsp;«/mo»«mo»§nbsp;«/mo»«mo»§nbsp;«/mo»«mn»2«/mn»«mover accent=¨true¨»«mi»u«/mi»«mo»§#8594;«/mo»«/mover»«mo»-«/mo»«mn»3«/mn»«mover accent=¨true¨»«mi»v«/mi»«mo»§#8594;«/mo»«/mover»«mo»=«/mo»«mover accent=¨true¨»«mi»b«/mi»«mo»§#8594;«/mo»«/mover»«/math»</span>, quan <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mover accent=¨true¨»«mi»a«/mi»«mo»§#8594;«/mo»«/mover»«mo»=«/mo»«mi»#a«/mi»«/math»</span> i <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mover accent=¨true¨»«mi»b«/mi»«mo»§#8594;«/mo»«/mover»«mo»=«/mo»«mi»#b«/mi»«/math»</span>.<div>Troba l'angle <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»§#946;«/mi»«/math»</span> format per <span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mover accent=¨true¨»«mi»u«/mi»«mo»§#8594;«/mo»«/mover»«mo»§nbsp;«/mo»«mi»i«/mi»«mo»§nbsp;«/mo»«mover accent=¨true¨»«mi»v«/mi»«mo»§#8594;«/mo»«/mover»«/math»</span> </div><div><span class="nolink">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»§#946;«/mi»«mo»=«/mo»«/math»</span>{:SA:=#alpha}º <font class="Apple-style-span" size="2">(l'angle amb 3 decimals)</font></div><div><br /></div>
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Monday, 15 July 2013, 9:11 AM
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