# idkkdi's latest activity

If you want high 90s, you need to go into depth.
For Business Studies, read through the textbook from start to finish. Memorise syllabus, memorise directives - completely memorised...
• idkkdi reacted to CM_Tutor's post in the thread need help again! TRIG FNS AND GRAPHS with Like.
If I take the question as having the function: y = A\sin(nt + b) with A = 1.91\text{ m} and given that at t = 0\text{ h} we have y =...
• idkkdi replied to the thread Refractive index.
1. The circular shape is useless for measuring refraction. More straightforward to use a straight block. 2. Make sure the plastic isn’t...
• idkkdi replied to the thread I want to repeat year 11.
A few points to consider: 1. The grass always seems greener on the other side. 2. Motivation is not sustainable. Discipline is. 3. OP is...
• idkkdi replied to the thread Physics Dynamics Q.
Ye, just realised I was trying to get v2 via energy formulas, but energy isn't conserved so gotta switch to momentum.
• idkkdi posted the thread Physics Dynamics Q in Physics.
help
• idkkdi replied to the thread 10 Units in Year 11.
Mb, prereq only applies for eco and commerce in arts.
• y=sin(nt+b) = sin(n(t+b/n)) At 0.5, b/n = 2b. Inside the brackets is t+2b, therefore the graph of t+2b changes by 2b meaning that if a...
• ah ok, that makes sense. But doesn't it look like its shifted by 104 degrees since it's shifted by 2/3 of the first quarter of a period.
• Hey where's my logic wrong here. One period of the graph is 720 degrees. So 0.52x2 = 1.04 for b?
• sin-1(0.95/1.91) tbh my intuition says its that value x2.
• idkkdi replied to the thread Polynomials help.
Are the answers in teacher suite?
• idkkdi replied to the thread Polynomials help.
Are answers in the teachers suite?
• idkkdi replied to the thread Polynomials help.
This stuff is easy, have you seen some of the other questions, what the actual fk is going on in the enrichment section.