Cssa mx1 (3 Viewers)

[taeyang]

My school did one they made....... which sucks.....

What did you have to do in q7? like what topic and how did you do it? ours was just an easy Projectile motion one

 

[muzeikchun852]

Q7 was a bit tricky.

This.

 

[Dylanamali]

Ours was also projectile motion.. and then we had some geometric/algebraic proof including tans.

 

[jamesfirst]

Projectile was easy IMO. We'll see how I go tho.


First I was like 'wtf' at the graph, but quickly got it.

 

[Dylanamali]

fml.. i f'ed up projections, but the rest of the paper was preety straight forward, nothing really caught me hugely off guard.
Probs made some silly mistakes thought.. should get 70/84+

 

[Weasel406]

Easy paper, 90+

 

[jamesfirst]

I used RHS and proved alpha to be 45, giving the angle in the semicircle to be 2alpha, therefore making it a right angle. :s

pretty sure that the chord was NOT a diameter. Well they didn't say it in the q, so you can't assume that it was a semicircle.

 

[brettymaccc]

pretty sure that the chord was NOT a diameter. Well they didn't say it in the q, so you can't assume that it was a semicircle.

Yeah but I proved that 4 alpha = 180 (using the triangles they gave and the angle that the tangent made with a chord (2alpha) to be equal to the angle in the alternate segment), and therefore making alpha 45.
Therefore, the "chord" through the circle made an angle of 90 with the diameter, and thus made it the diameter (as the angle in a semicircle is a right angle).

 

[Riproot]

Got the paper back today.
First with 86%.
I came second overall.

 

[jeel]

Got the paper back today.
First with 86%.
I came second overall.

could you put the paper up?

 

[Riproot]

could you put the paper up?

It's a bit late now. I'll put it up tomorrow arvo.