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anonymous
 one year ago
Getting another Calculator Error Cosine Law Trig
Here is the problem
A = 103 degrees
Sides are
b =31
c=52
Equation
\( a^2 = 31^2+52^22\times 31 \times 52 \) = a = 66.2589
\( \large \cos B = \frac{66.25^2 +52^231^2}{2\times 66.25\times52} \)
Am I right so far?? Do you get an error?
anonymous
 one year ago
Getting another Calculator Error Cosine Law Trig Here is the problem A = 103 degrees Sides are b =31 c=52 Equation \( a^2 = 31^2+52^22\times 31 \times 52 \) = a = 66.2589 \( \large \cos B = \frac{66.25^2 +52^231^2}{2\times 66.25\times52} \) Am I right so far?? Do you get an error?

This Question is Closed

AbdullahM
 one year ago
Best ResponseYou've already chosen the best response.1Where is cos(A) in the equation?

AbdullahM
 one year ago
Best ResponseYou've already chosen the best response.1\( \sf a^2 = 31^2+52^22\times 31 \times 52 cos(103)\) = 66.2589

AbdullahM
 one year ago
Best ResponseYou've already chosen the best response.1Oh nevermind, you forgot to put cos(103) but you arrived at the correct a value.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Did I forget to square that??

AbdullahM
 one year ago
Best ResponseYou've already chosen the best response.1\( \sf a^2 = 31^2+52^22\times 31 \times 52 cos(103)\) then a=66.2589 not a^2, my bad.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ok cool. Do you get an error on your cal??

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\( \huge B =\cos^{1}( \frac{66.25^2 +52^231^2}{2\times 66.25\times52} )\) I get an error

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Crap it worked this time........ I got 27.12

AbdullahM
 one year ago
Best ResponseYou've already chosen the best response.1So now we have: A= 103 degrees a = 66.26 b=31 c=52 Using sin laws \(\sf\Large \frac{sin103}{66.26} =\frac{sinB}{31}=\frac{sinC}{52}\) So we want to solve for \(\sf B\). \(\sf\Large \frac{sin103}{66.26} =\frac{sinB}{31}\) Cross multiply \(\sf\Large sin(103) \times 31 = Sin B\times 66.26\)

AbdullahM
 one year ago
Best ResponseYou've already chosen the best response.1Yes, 27.12 is the correct value for B :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0That is strange..... I did not do anything . I just hit my back button to bring it up again and then hit enter and it gave me the answer. LOL

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Wierd.... Stuff is going to drive me batty

AbdullahM
 one year ago
Best ResponseYou've already chosen the best response.1Calculators are evil lol

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thanks for the help. :)

AbdullahM
 one year ago
Best ResponseYou've already chosen the best response.1Once you get the hang of the questions, it will become more easier xD
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