2010, question 6) iv) (1 Viewer)

[andybandy]

http://www.boardofstudies.nsw.edu.a...doc/2010-hsc-exam-mathematics-extension-1.pdf
I dont really understand how to prove it?

 

[HeroicPandas]

It says to use (iii) to show that F'(theta) = 0 when (theta) = blah

It is saying, prove that:

 

[andybandy]

its a 1 marker though, so im really curious if, that id have to expand all that

 

[HeroicPandas]

its a 1 marker though, so im really curious if, that id have to expand all that

Well in part (iii)

You prove that F'(theta) = 0 right?

What is the condition when this is true?

Spoiler

\tan2\theta \tan\alpha = -1

Use this to find the value of theta

 

[andybandy]

how would i do that though? im sorry ahah, this is just really confusing me