VCE Stuff > VCE Specialist Mathematics
Specialist 1/2 Question Thread!
Ruchir:
--- Quote from: keltingmeith on December 07, 2020, 02:07:38 pm ---Okay, well try breaking the series up and see if that makes things easier. Eg,
When m=1, you go up to x^(2m)=x^2: 1 - x^2
When m=4, you go up to x^(2m)=x^8: 1 - x^2 + x^4 - x^6 + x^8
Try a few more, fill out the series, count up the terms, and see what you notice
--- End quote ---
Thanks I got it. :)
Just 1 quick question
When they say m is even, do they mean all values of m are supposed to be even?
Ruchir:
I don’t understand when for 9 a and b.
Here’s what I did
for A. 6*6*5*3 = 540 Pr(even) = 540/1470
For B just Pr(odd) = 930/1470
But the answer if for B is 720/1470
And for A is 750/1470
Please help and explain what I did wrong
cloudyy:
Could someone help me with this q?
From the top of a cliff 160m high, two buoys are observed. Their bearings are 337 and 308. Their respective angles of depression are 3 and 5. Calculate the distance between the buoys.
I've tried drawing a diagram to figure it out, but I'm way too confused on how to draw the diagram with bearing included. Any tips?
fun_jirachi:
Hey there!
Open for a diagram
If you open the above spoiler, I've drawn a diagram on paint. Hopefully it's clear enough, the green triangle corresponds to the buoy with bearing 337 and the red triangle corresponds to the buoy with bearing 308.
Try using different colours and angle your North-South axis a bit so you leave space for the vertical axis for 3D diagrams like this, and feel free to exaggerate the angles a bit as diagrams don't really need to be accurate as they only serve as an interpretive tool.
Further help in the spoiler below if you need it, just in case of followups:
SpoilerFind the distance from the cliff to each of the buoys using trig ratios, then use the cosine rule to find the distance between the buoys.
Hope this helps :)
cloudyy:
--- Quote from: fun_jirachi on January 22, 2021, 01:07:50 am ---Hey there!
Open for a diagram
If you open the above spoiler, I've drawn a diagram on paint. Hopefully it's clear enough, the green triangle corresponds to the buoy with bearing 337 and the red triangle corresponds to the buoy with bearing 308.
Try using different colours and angle your North-South axis a bit so you leave space for the vertical axis for 3D diagrams like this, and feel free to exaggerate the angles a bit as diagrams don't really need to be accurate as they only serve as an interpretive tool.
Further help in the spoiler below if you need it, just in case of followups:
SpoilerFind the distance from the cliff to each of the buoys using trig ratios, then use the cosine rule to find the distance between the buoys.
Hope this helps :)
--- End quote ---
You're my lifesaver!! Can't thank you enough, thank you!
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