Maths Extension 2 Predictions/Thoughts (1 Viewer)

[dsakvyilsa]

Pretty sure it was a mistake. My whole class and everyone on here seemed to get 2 theta.

omg the 2 theta thing, I was literally SO close like I literally had everything except the theta threw me off so bad

 

[carrotsss]

@Trebla can you explain 15.a)ii)

 

[Hudz777]

that integration question btw..... In = 1/2^2n

was the theta a typo.... i got 2theta

everyone in my class did

sameeeeee wtf

 

[amborger]

if the period is 8pi, it would take at least 4pi seconds for the first particle to start travelling in the opposite direction, i don't think it's 3pi

wait i feel like this is not true because the first stationary point comes at 1/4 of the period

 

[constexpr]

wait i feel like this is not true because the first stationary point comes at 1/4 of the period

erm, i'm pretty shit at this topic, but if it's already starting at the extremity, then the next time it would turn, is 1/2 of the period

 

[synthesisFR]

omg the 2 theta thing, I was literally SO close like I literally had everything except the theta threw me off so bad

I’m so mad about that I was gonna use double angle but it would have yielded two theta so I instead started using trig identities on cos 2n+1 and then my answer got disgusting and I wasted so much time on that wtfff
Even if Nesa does something it wouldn’t save the time I wasted on it

 

[carrotsss]

it’s so weird because the limits mean you can’t even dummy variable it so idk

 

[Hudz777]

omg the 2 theta thing, I was literally SO close like I literally had everything except the theta threw me off so bad

same what the actual.

 

[Hudz777]

if the period is 8pi, it would take at least 4pi seconds for the first particle to start travelling in the opposite direction, i don't think it's 3pi

draw the graphs, its more like 5pi

 

[amborger]

so excited to get 0 marks for SHM question

 

[gamja]

that integration question btw..... In = 1/2^2n

was the theta a typo.... i got 2theta

everyone in my class did

I GOT 2THETA ASW WTF
(no way NESA got it wrong tho...)

 

[amborger]

yall was the mech question 8.7m

 

[synthesisFR]

draw the graphs, its more like 5pi

Did u get 5 pi as well

 

[synthesisFR]

yall was the mech question 8.7m

I don’t remember

 

[ms_grape_taco]

same what the actual.

Wait once you had double angle you pretty much got the answer?

 

[carrotsss]

I GOT 2THETA ASW WTF
(no way NESA got it wrong tho...)

literally everyone is saying 2theta idfk

@Some actual teacher/maths expert pls are we all stupid

 

[ms_grape_taco]

BRO THATS NOT FAIR... I THOUGHT I HAD DONE IT ALL WRONG AHHHH

 

[carrotsss]

yall was the mech question 8.7m

I think I remember than number from somewherr

 

[pdawg]

yall was the mech question 8.7m

I got 2.3 from the graph. You have to let y=0 to find range and then eventually you have an equation between the two graphs so you have to find where they intercept.

 

[candylulu]

Pretty sure it was a mistake. My whole class and everyone on here seemed to get 2 theta.

if you sub u = 2 theta and then split the resultant integral into 0~pi/2 and pi/2~pi you can dummy variable and get the answer ^^