VCE General & Further Maths Question Thread!

[Einstein]

The diagram for 9 even though it's a bit dodgy.
Also, i think for question 15, from the top of my head it's using either the sine or cosine rule. I think you have 3 angles and a side (30cm) 105, 37.5, 37.5 (??). Im not up to the trigonometry module just yet and this is all the things i remember last year, so i might be wrong.

Thanks!

Its cosine, but im not sure how to apply it here..

[Einstein]

how do you draw this? if you want to figure it out as well its 110m.

Ive tried different drawings best ive got is 116m...

[Zealous]

how do you draw this? if you want to figure it out as well its 110m.

Ive tried different drawings best ive got is 116m...

(O=bottom of the triangle)

[Einstein]

Thanks for that Z

BTW, how is angle ABT 80 degrees?

[Einstein]

an equlateral triangle has altitudes of length 20cm. Find the length of one side.

I would've suspected 20cm, due to equilateral, but answer is 23.09, can someone draw a diagram and how me how its done?

Thanks

[Conic]

Let x be the length of the sides.

[Einstein]

stuck on this for ages

someone help please

[Thorium]

stuck on this for ages

someone help please

If AO' is 6 cm then, BO' is also 6 cm. same with AO and BO. So Now you have two triangles and you know all the side lengths. Therefore you use cosine rule to find AO'B ans AOB.

Hope that helps

[Einstein]

I'll have a try. What's a chord? And do I need to worry about it in this q?

Thanks

[Thorium]

I'll have a try. What's a chord? And do I need to worry about it in this q?

Thanks

A cord is just a line connecting to points. They say there is a cord/line between A and B.

[Einstein]

got it right, thanks

[Einstein]

how do i do these 2? i dont think i got the diagram right.

thanks

[Thorium]

how do i do these 2? i dont think i got the diagram right.

thanks

I have attached the solutions. For the second one, we can also use the cosine rule for finding angles to find angle KLM, as we have all three sides known.

Hope it helps

[Einstein]

Thanks for that Thorium

i also had these, how do i do 17a, i figured out 17b (after looking at answers for value of a).

And also 2d and 2e.

Thanks

[Thorium]

Thanks for that Thorium

i also had these, how do i do 17a, i figured out 17b (after looking at answers for value of a).

And also 2d and 2e.

Thanks

I had a go with question 17a, i have attached the solution.