Topic: Cosine Rule
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How to Use the Cosine Rule
1 Find, using geometry or otherwise, the required variables . There are two cases in which the Cosine Rule can be used: All three sides are known When all three sides of a triangle are known or can be calculated. In this situation, the Cosi... Read More »
Source: http://www.wikihow.com/Use-the-Cosine-Rule
How is the cosine rule derived?
the cosine rule is derived from the division of the adjacent side & hypotenuse Read More »
Source: http://wiki.answers.com/Q/How_is_the_cosine_rule_derived
What are the sine and cosine rules?
Let theta be an angle measured counterclockwise from the x-axis along the arc... Read More »
Source: http://www.chacha.com/question/what-are-the-sine-and-cosine-rules
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Cosine Rule
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Remember: SOHCAHTOA (say "soh-ca-toa") not a real word but a helpful mnemonic Sine = opposite / hypotenuse Cosine = adjacent / hypotenuse Tangent = opposite / adjacent So the cosine rule is Cosine = adjacent / hypotenuse The cosine of an an...
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Source: http://uk.answers.yahoo.com/question/index?qid=20111015025017AANn...
http://en.wikipedia.org/wiki/Law_of_cosines http://revisioncentre.co.uk/gcse/maths/triangle.gif ok if the go to the links it would show u clearly usally i would use the farest side as (c) and the others i would put as (a) the nearest and (b...
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Source: http://answers.yahoo.com/question/index?qid=20090530083016AA1UPY0
The sine rule is a comparison of ratios: (sin A)/a = (sin B)/b = (sin C)/c. The cosine rule looks similar to the theorem of Pythagoras: c2 = a2 + b2 - 2ab cos C.
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Source: http://wiki.answers.com/Q/How_does_one_differentiate_between_the_...
We stat with the law of cosines, which we can assume to be true: c2 = a2 + b2 - 2ab*cos(C) Then rearrange it: cos(C) = a2 + b2 - c2/2ab Use the identity sin(x)=SQRT(1-cos(x)) sin(C) = SQRT( 1 - (a2 + b2 - c2/2ab)2) Use the operator A = 1/2a...
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Source: http://wiki.answers.com/Q/How_can_you_use_the_Cosine_Rule_to_prov...
To solve a triangle based on one angle and two sides. In general it is preferable to the sine rule which is superfically similar but has the problem of the ambiguous case.
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Source: http://answers.yahoo.com/question/index?qid=20120328123618AAqtmHX
Interestingly enough.. http://www.muslimheritage.com/topics/default.cfm?ArticleID=662 That guy apparently... Source(s): http://www.muslimheritage.com/topics/default.cfm?ArticleID=662
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Source: http://answers.yahoo.com/question/index?qid=20080916123621AAmDUdy
