Parametric differentiation (Edexcel IAL P4 5.1)

Pearson Edexcel IAL Pure Mathematics 4 Unit 5.1 Parametric differentiation
Unit 5 - Differentiation

[prodxtendo]

I can't stop appreciating how much of a support you are. You are the reason I passed with an A in pure 1 and 2 last year. My school teachers were useless compared to you. Thank you so much, once again.

[dofta]

Thank you for your videos! Please keep posting the rest of P4 if possible, they are truly helpful:D

[nesarakularatne]

Sir at 9:49 why did u take (t-1)^2 instead of (t^2-1)^2

[neptune-ri]

how did we gett 3pi/2 as a solution for t in Q5, part c. 14:30

[fatemakagalwala]

How can we cancel (t-1)^2 and (t^2 -1 )^2. It does not make sense because (t^2 -1)^2 can be factorised as (t+1)^2 (t - 1)^2 so (t+1)^2 is left after cancellation

[mikoalt]

In Q2 @ 10:58 can u explain the last bit and how u found out the eqn of the line? I didn't quite understand it.

[dearlantsov]

hi sir i had a question!
instead of finding dy/dx by doing dx/dt and dy/dt, why can't we just find the Cartesian equation of x and y and then differentiate that equation? it'll be dy/dx too right?

[farahsaleh]

in Q1 c it the dx/dt was (t^2-1)^2 why did u put it in the dy/dx equation as t not t square?

[Arianbazyani]

does it matter what form you write the equation of a line ?

[mysha]

sir why did u write the differential of 2sin^t as 4 sintcost in qn 3?