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anonymous
 one year ago
help!! ~*~*~*~ fan n medal ~*~*~*~ !!!!!!!!!!!
Find AC. Round the answer to the nearest tenth. (image below!!!!)
anonymous
 one year ago
help!! ~*~*~*~ fan n medal ~*~*~*~ !!!!!!!!!!! Find AC. Round the answer to the nearest tenth. (image below!!!!)

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ill get help @Keigh2015 @Mehek14

MrNood
 one year ago
Best ResponseYou've already chosen the best response.0This is a classic example of the cosine rule Do you know the cosine rule?

MrNood
 one year ago
Best ResponseYou've already chosen the best response.0no  htat is the Pythagoras rule cosine rule is a^2 = b^2 + c^2  2bc cos(A) do oyu recognise that?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so 1.3^2 is equal to x^2 + 1.1^2

MrNood
 one year ago
Best ResponseYou've already chosen the best response.0OK  well you need to just get a handle on the meaning of a,b c and angleA and refer them to the values in your diagram you are directly given in the drawing the equivalent of b, c and angleA so oyu can use the formula as I gave it to solve for a (which is the side AC in your diagram)

MrNood
 one year ago
Best ResponseYou've already chosen the best response.0dw:1437053951148:dw put the values from your drawing into the diagram above then use cosine formula to solve for a

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0hte formula you gave me makes no sense with te triangle

MrNood
 one year ago
Best ResponseYou've already chosen the best response.0That's why I said you need to understand the formula and what a,b,c and A mean However my diagram above gives you more guidance replace the values in your drawing with the letters in my diagram  THEN it corresponds with the formula.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is as far as i got...  2bc doesnt make any sense

MrNood
 one year ago
Best ResponseYou've already chosen the best response.0so when I asked if oyu recognised the cosine rule you said yes but it seems oyu don't You need to review oyur notes or study "Cosine Rule" and understand it , before you can answer this question. This is evidently the topic oyu are studying  so refer to your class , or your text, or search online  but you must understand it before you can answer this

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0will you attempt to explain?

MrNood
 one year ago
Best ResponseYou've already chosen the best response.0I'm afraid I don't have time to go back to the beginning the question is a classic example of the 'cosine rule' (sometimes called 'law of cosine' and allows you to solve a triangle when you know 2 sides and the include angle (as in oyur drawing). The only slightly tricky bit is the 'nomenclature' i.e. which side is a,b ,c and which angle is A look here for an explanation https://en.wikipedia.org/wiki/Law_of_cosines with the cosine rule and the sine rule you can solve nearly all problems about triangles
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