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<p><span style="color: #003300;"><strong>Els costats d'un triangle són de longituds «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨12px¨»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»#«/mo»«mi mathvariant=¨bold¨ mathcolor=¨#003300¨»a«/mi»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»,«/mo»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»§#160;«/mo»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»§#160;«/mo»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»#«/mo»«mi mathvariant=¨bold¨ mathcolor=¨#003300¨»b«/mi»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»§#160;«/mo»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»§#160;«/mo»«mi mathvariant=¨bold¨ mathcolor=¨#003300¨»i«/mi»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»§#160;«/mo»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»§#160;«/mo»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»§#160;«/mo»«mo mathvariant=¨bold¨ mathcolor=¨#003300¨»#«/mo»«mi mathvariant=¨bold¨ mathcolor=¨#003300¨»c«/mi»«/mstyle»«/math» cm. Calculeu el sinus de l'angle més petit.</strong></span></p> <p><strong><span style="color: #000080;"><span style="color: #ff6600;">Format de la resposta:</span> </span></strong>als centèsims</p>
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Answer 1
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Answer 2
Answer
Grade
None
100%
90%
83.33333%
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75%
70%
66.66667%
60%
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33.33333%
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16.66667%
14.28571%
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11.11111%
10%
5%
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100%
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33.33333%
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Hint 1
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<p><span style="color: #000080;"><strong>El costat més petit està enfront de l'angle més petit. </strong></span></p> <p><span style="color: #000080;" data-mce-mark="1"><strong>Cal doncs calcular l'angle A oposat al costat a que mesura #a cm, </strong></span></p> <p><span style="color: #000080;"><strong>amb el teorema del cosinus:</strong></span></p> <p><span style="color: #000080;"><strong>«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi mathvariant=¨bold¨ mathcolor=¨#000066¨»A«/mi»«mo mathvariant=¨bold¨ mathcolor=¨#000066¨»=«/mo»«mi mathvariant=¨bold¨ mathcolor=¨#000066¨»acos«/mi»«mfrac mathcolor=¨#000066¨»«mrow»«msup»«mi mathvariant=¨bold¨»b«/mi»«mn mathvariant=¨bold¨»2«/mn»«/msup»«mo mathvariant=¨bold¨»+«/mo»«msup»«mi mathvariant=¨bold¨»c«/mi»«mn mathvariant=¨bold¨»2«/mn»«/msup»«mo mathvariant=¨bold¨»-«/mo»«msup»«mi mathvariant=¨bold¨»a«/mi»«mn mathvariant=¨bold¨»2«/mn»«/msup»«/mrow»«mrow»«mn mathvariant=¨bold¨»2«/mn»«mo mathvariant=¨bold¨»§#183;«/mo»«mi mathvariant=¨bold¨»b«/mi»«mo mathvariant=¨bold¨»§#183;«/mo»«mi mathvariant=¨bold¨»c«/mi»«/mrow»«/mfrac»«/math»</strong></span></p>
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Thursday, 23 August 2018, 4:17 PM
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