Parametric Equations 7 • Modelling - trigonometry example • P2 Ex8E • 🚀

Edexcel Pure Year 2

Tues 13/10/20

[aaryanlad]

Hi Sir, at 6:02 part b, if it were to ask for the value of t when the skater crosses their path, would the answer be t + 2/15 x pi the secondary value of t, or the primary value of t, t = 1/30 x pi?

[chuchu]

Sir in the future could you please make a video on answering parametric exam questions because I still find it difficult to understand. It would help if you could show how to answer them. No rush though, you can make it whenever you want to.

[samuelbrodie]

For the last part, could you also say that at the start y= -6roort3 and so make that =12sin(10t-pi/3) then find the 3rd solution and then find t? It's the same method you showed but instead investigating the y value instead of x.
Thank you

[danielalizadeh]

Could you use double angle formulae for this question?

[leo-gzip]

for part b), was there a way to do it without knowing that the point of intersection was the x-axis??

[danihalford]

Hi sir, on the first one how can t=0, i understand that it is at the start but the restrictions says strictly larger than 0, thanks