ALEVEL MATH P3 QUESTION =O

[ParanoidAleveler]

This is M/J 2010 Question 7.
I get the first 2 parts but i dont knw what to do in the third part.
PLEASE HELP!

 

[ParanoidAleveler]

HELP HELP HELP


LOL

 

[Mortal9090]

HELP HELP HELP


LOL

=> e^(2t)dy/dt=cos^(2)x
=> dy/dt=e^(-2t)cos^(2)x
which is > 0 for all values of t,

so x increases as t increases.

x is an increasing function!!

 

[Nera]

Please I need help in Nov 2010 Variant 53 question 10 part (ii) (b)

I got the answers to the previous parts but I ddn't manage this part

 

[ahmed t]

u just square root previous anser

 

[ParanoidAleveler]

HELP HELP HELP


LOL

=> e^(2t)dy/dt=cos^(2)x
=> dy/dt=e^(-2t)cos^(2)x
which is > 0 for all values of t,

so x increases as t increases.

x is an increasing function!!

which question is this?! im talking abt A-level Pure Math Paper 31 queation 7

 

[WellWIshER]

lol

 

[ahmed t]

u drew a cicle and shaded the bottom hemisphere right
now u want to draw the tangent to the circle since it will have the smallest angle from the x axis
using pythagorus theroem u may find the length