Maths Ext 1 question (1 Viewer)

[Tryingtodowell]

how do I approach this prob basic question that I might be overcomplicating

 

[WeiWeiMan]

View attachment 43762
how do I approach this prob basic question that I might be overcomplicating

you should approach it the same way you kinda approach auxilliary angle questions

f(x) = 5sinx+12cosx = sqrt(5^2+12^2)sin(x-a) = 13sin(x-a)

from there, it's pre clear that |f(x)| ≤ 13

 

[Average Boreduser]

View attachment 43762
how do I approach this prob basic question that I might be overcomplicating

r-method/auxilary method bruv.