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Si el sinus d'un angle és positiu, marca l'opció correcta d'entre les següents:
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Recorda que si el sinus d'un angle és positiu, l'angle ha de pertànyer al primer o al segon quadrant, és a dir és un angle entre 0 i <span class="nolink">«math xmlns="http://www.w3.org/1998/Math/MathML"»«mi»§#960;«/mi»«/math»</span>.
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1., 2., 3., ...
i., ii., iii., ...
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Choice 1
Answer
el cosinus d'aquest angle és negatiu
Grade
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Feedback
Atenció, si l'angle és del primer quadrant, és a dir, és una angle major que 0 i menor que <span class="nolink">«math xmlns="http://www.w3.org/1998/Math/MathML"»«mfrac»«mo»§#960;«/mo»«mn»2«/mn»«/mfrac»«/math»</span> radians, el cosinus és positiu.<br />#p<br />
Choice 2
Answer
el cosinus d'aquest angle és positiu
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
60%
50%
40%
33.33333%
30%
25%
20%
16.66667%
14.28571%
12.5%
11.11111%
10%
5%
-5%
-10%
-11.11111%
-12.5%
-14.28571%
-16.66667%
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-33.33333%
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Feedback
Atenció, si l'angle és del segon quadrant, és a dir, és una angle major que<span class="nolink">«math xmlns="http://www.w3.org/1998/Math/MathML"»«mfrac»«mo»§#960;«/mo»«mn»2«/mn»«/mfrac»«/math»</span> radians i menor que <span class="nolink">«math xmlns="http://www.w3.org/1998/Math/MathML"»«mo»§#960;«/mo»«/math»</span> radians, el cosinus és negatiu.<br />#q<br />
Choice 3
Answer
el cosinus d'aquest angle pot ser positiu o negatiu
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
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50%
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14.28571%
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Feedback
Molt bé, depèn de si es tracta d'un angle del primer o del segon quadrant.<br />#m<br />
Choice 4
Answer
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None
100%
90%
83.33333%
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70%
66.66667%
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33.33333%
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Feedback
Choice 5
Answer
Grade
None
100%
90%
83.33333%
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75%
70%
66.66667%
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33.33333%
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Feedback
Choice 6
Answer
Grade
None
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83.33333%
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66.66667%
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Feedback
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33.33333%
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Created / last saved
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Admin User
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Wednesday, 12 June 2013, 1:04 PM
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on
Wednesday, 12 June 2013, 1:04 PM
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