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Thanks for part i. But for part ii, as the other 2 guys realised, and I just realised, you have to multiply that answer by 2...so I guess the answer is 240. Either way, both given answers are wrong, so thanks for confirming that. :)

Hi guys, I have some (more!) questions; this time they're related to permutations and combinations. I have a very strong suspicion (read: almost certainty) that the given answers for these questions are incorrect, but I need confirmation from you guys... How many different arrangements can...

Oh my god, I can't believe this...I didn't even comprehend that it said the bearing from David to the mountain was 109°. I actually don't understand how I did not notice that it said the bearing from David, and kept thinking it was from the mountain, after attempting that question at least three...

Hi guys, Q: David is in a life raft and Anna is in a cabin cruiser searching for him. They are in contact by mobile telephone. David tells Anna that he can see Mt Hope. From David’s position the mountain has a bearing of 109°, and the angle of elevation to the top of the mountain is 16°. Anna...

Hi guys, I have some questions from the Moving About module... Q1. I need help with understanding why the given answer to this question (see below) is correct. I just don't get it. Shouldn't the vector adjacent to theta (pointing up) be pointing the opposite direction, considering addition of...

Oh, sorry about the late reply! I haven't checked BoS in months. I don't think I need a tutor anymore right now, but I'll surely consider you in the future if I need one! :)

I got 36.06m (2 dec. pl.), which is basically what you got too, so I can confirm that the answer given (43.3m) is wrong. This is my diagram anyway, since you asked for it: Thanks for your help again. :)

No, it was handwritten, so there were definitely no typos going on. I think they misread the diagram they had drawn and thought the 30 n.m. for BA was the angle (30 degrees) they needed. Thank you for confirming this for me. :)

I had used the cosine rule to find angle BCA, and I got 49 deg. 46' (nearest min.). I didn't use MAC (I couldn't understand how it helps answer the question); I used angle MCA, for which I got 65 deg. (using alternate angles with angle SAC as you mentioned) Then I said that as angle MCA = angle...

I know this seems like a relatively simple enough question, but I cannot get the "right" answer, so please provide the answer, and don't just half-complete the question. I just want to know the answer so that I can confirm whether or not the answer the answer key gives is wrong. Thanks in...

Thanks. :)

For example, angle theta is an angle between the x-axis and the ray. I just want to know if there's a reason for why it has to be the x-axis, and not the y-axis.

Hi guys, I have a question regarding calculating angles, and though it's not really that important, I would really like to know it just for my knowledge... oh, and please explain in relatively simple terms!!! It says that "acute angles must be calculated relative to the x-axis, and never the...

Hi! I'm going into Yr 11 this year, and I think I need a tutor in English. I'm doing Advanced and Extension 1. My requirement for a tutor is: - Preferably a HSC marker/experienced English teacher I was wondering if you guys have any recommendations for such tutors... :) Thanks in advance! :D