All I managed to get out of this is that cos(58) = 12/(5x + y)

Interdice Well-Known Member Joined Jun 24, 2021 Messages 489 Gender Male HSC 2023 Feb 27, 2023 #1 All I managed to get out of this is that cos(58) = 12/(5x + y)

D Drongoski Well-Known Member Joined Feb 22, 2009 Messages 4,211 Gender Male HSC N/A Feb 27, 2023 #2 Wonder if answers approx: 0.926 + 2.451 i and 1.797 - 1.906 i

Interdice Well-Known Member Joined Jun 24, 2021 Messages 489 Gender Male HSC 2023 Feb 27, 2023 #3 looking at the answers it is actually b = 3i -3j or b = 1.6i + 4.2j. NEed some help figuring out how to get to the answers

looking at the answers it is actually b = 3i -3j or b = 1.6i + 4.2j. NEed some help figuring out how to get to the answers

T tywebb dangerman Joined Dec 7, 2003 Messages 1,624 Gender Undisclosed HSC N/A Feb 27, 2023 #4 I think we will be doing this: At this point I think you can solve it but I put the equations in wolframalpha in the following way: 5x+y=12 and cos(58 degrees)=12/sqrt(26x^2+26y^2) and got this: Last edited: Feb 27, 2023

I think we will be doing this: At this point I think you can solve it but I put the equations in wolframalpha in the following way: 5x+y=12 and cos(58 degrees)=12/sqrt(26x^2+26y^2) and got this:

D Drongoski Well-Known Member Joined Feb 22, 2009 Messages 4,211 Gender Male HSC N/A Feb 27, 2023 #5 I got |b| = 2.618 . . . instead of 4.441 . . .. With this correction,(multiplying my answers by 4.441/2.618) should end up with roughly the same answer.

I got |b| = 2.618 . . . instead of 4.441 . . .. With this correction,(multiplying my answers by 4.441/2.618) should end up with roughly the same answer.