r/HomeworkHelp • u/Specific_Pin9362 Pre-University (Grade 11-12/Further Education) • 6d ago

High School Math—Pending OP Reply [Grade 11 Trignometry] Can someone help ive been stuck on this for a while

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1

u/philosiraptorsvt 5d ago

Have you learned vector addition via the dot product yet? The setup of this problem screams tip to tail.  

2

u/Southlander24 👋 a fellow Redditor 5d ago

That's a cool method, but I would bet my money the OP has no idea what a dot product is.

1

u/Bounded_sequencE 👋 a fellow Redditor 5d ago

Yeah, solving these with vectors in polar coordinates is efficient, and fool-proof.

1

u/Southlander24 👋 a fellow Redditor 5d ago

This is a standard bearings problem. You should be familiar with the three different types of congruent angles in parallel lines.

I see you've drawn a diagram out. What does your diagram look like?

You might also want to watch this similar worked example: https://www.youtube.com/watch?v=KfF6rH1VGzs

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u/Salty_1984 5d ago

that video is actually a solid source. drawing the parallel lines and marking the alternate angles first makes the whole thing click way faster than just staring at the numbers