• Want some good practice on harder HSC questions?
    Our BoS trial exams will be held on:
    ● 4th October (Maths Ext2)
    ● 4th October (Maths Ext1)
    ● 5th October (Chemistry)
    Click here for details on how to register
  • Happy 20 YEARS to us!

Can I get some help with questions? (1 Viewer)

jssicachoi

New Member
Joined
Apr 27, 2021
Messages
8
Gender
Female
HSC
2022
1. From a point P, a person observes that the angle of elevation of the top of a cliff A is 40°. After walking 100 m towards A along a straight road inclined upwards at an angle of 15° to the horizontal, the angle of elevation of A is observed to be 50°. Find the vertical height of A above P

Could I please get a diagram along with the answer
I will add extra question on this thread:)
 

jssicachoi

New Member
Joined
Apr 27, 2021
Messages
8
Gender
Female
HSC
2022
Can I please get help with question a. I know how to solve it but i feel the working out will not make sense.help.PNG
 

jssicachoi

New Member
Joined
Apr 27, 2021
Messages
8
Gender
Female
HSC
2022
really easy trigonometry problem but i am dumb:

0° < x < 360°
sin x = sin y (find all possible values for x)
 

jimmysmith560

Le Phénix Trilingue
Moderator
Joined
Aug 22, 2019
Messages
3,093
Location
Krak des Chevaliers
Gender
Male
HSC
2019
Uni Grad
2022
Original Poster said:
how do i find the red marked part? i tried labelling everything but i cant seem to able to find that specific angle. i have uploaded my diagram and the q does someone mind helping me??
thanks

image.jpg image.jpg
I would suggest having a look at the following working. The diagram appears to be drawn slightly differently from yours.

1662187447465.png

Very similar versions of this question also appeared in a Baulkham Hills High School trial paper as well as the Cambridge textbook, where the diagrams provided look like this:

BHHS paper:
1662187751637.png

Cambridge textbook:
1662187709391.png

I hope this helps! 😄
 

Attachments

jimmysmith560

Le Phénix Trilingue
Moderator
Joined
Aug 22, 2019
Messages
3,093
Location
Krak des Chevaliers
Gender
Male
HSC
2019
Uni Grad
2022
Original Poster said:
thanks alot this makes much more sense my diagram was wrong no wonder it was so confusing
Original Poster said:
do u mind telling me what bhhs paper it was from or sending it to me pls
it would be greatly appreciated
No worries!

It is included in the 2009 BHHS 2U trial paper, although BHHS's version of this question does not include part iv (the Cambridge version includes all parts). Either way, you can access it using the following link:

 
Last edited:

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top