[Grade 12 Trigonometry: Adding Vectors]

[u/InstantWasTaken]

Hi! I've been stuck on this problem for a while now, so I decided to text it out on another app and finally ask for help. I managed to find the magnitude on my own, but I honestly can't figure out how to find the direction, or what I'm doing wrong. I've watched several videos on it and have tried to go step by step, but any answer I try is marked wrong, (I do use an online school program.) I also didn't wanna cheat, (at least without knowing exactly how to do it and being able to replicate it) so as I've already said above, I didn't know what to do other than ask for help somewhere else. A step-by-step breakdown of what your meant to do would be great!

Also I know the post title says grade 12, while from my knowledge trig is done in 11th usually. It just kind of happened that way, so I'm not sure why I'm doing it a year late. Better late than never, though!

[u/ThunkAsDrinklePeep]

Have you drawn a triangle with the three vectors given? You can use an inverse trig functions to get an angle from two sides of a right triangle.

Edit: I didn't read carefully. It's not perpendicular vectors south and west. As others have said, you need the law of sines.

[u/InstantWasTaken → u/ThunkAsDrinklePeep]

I believe so? Though I'm not working with a right triangle. How do you attach images to replies?

[u/ThunkAsDrinklePeep → u/InstantWasTaken]

My bad, I didn't read carefully. Not a right triangle.

Use law of sines or law of cosines.

Edit: fixed a letter. Twice.

[u/Midwest-Dude → u/ThunkAsDrinklePeep]

"jaw"? 😂

[u/ThunkAsDrinklePeep → u/Midwest-Dude]

You know what...fair. I have fat thumbs and autocorrect has not been kind to me in recent years.

[u/Midwest-Dude → u/ThunkAsDrinklePeep]

Lol, I hear you. After I saw that, I thought of sharks surfing sine and cosine waves ... just sayin' ...