Join TSR now and get all your revision questions answeredSign up now

Maths year 11 Watch

    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    Ah good, then this should be straight forward.

    If you label the angle at the tower, lets say \theta (called theta), then you know that tan\theta is the opposite side divided by the adjacent side, with opposite being 4.5 and adjacent being 2.1 as you can see. You can find the actual angle by doing inverse tan. Of course, this angle is not the bearing because bearings are measured from the North, therefore you need to find the other angle long that line by doing 180-\theta, and that should give you the bearing. Don't forget bearings are shown as 3 digits.
    So do I find the hypotenuse

    Posted from TSR Mobile
    • Community Assistant
    • Welcome Squad
    Offline

    3
    ReputationRep:
    (Original post by z_o_e)
    So do I find the hypotenuse

    Posted from TSR Mobile
    Well realistically you have choices, you can use the hypoteneuse and work with either sine or cosine, or you can use the two sides of the triangle which would require you to use tan (refer back to what I said if you want to use tan). You already know the hypoteneuse though, you found it in the previous part.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    Well realistically you have choices, you can use the hypoteneuse and work with either sine or cosine, or you can use the two sides of the triangle which would require you to use tan (refer back to what I said if you want to use tan). You already know the hypoteneuse though, you found it in the previous part.
    Did this.


    Posted from TSR Mobile
    Attached Images
     
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    Well realistically you have choices, you can use the hypoteneuse and work with either sine or cosine, or you can use the two sides of the triangle which would require you to use tan (refer back to what I said if you want to use tan). You already know the hypoteneuse though, you found it in the previous part.

    I Did this.


    Posted from TSR Mobile
    • Thread Starter
    Offline

    2
    ReputationRep:
    Here

    Posted from TSR Mobile
    Attached Images
     
    • Community Assistant
    • Welcome Squad
    Offline

    3
    ReputationRep:
    Correct. You can now use this to find the bearing as you know the angles on a straight line add up to 180.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    Correct. You can now use this to find the bearing as you know the angles on a straight line add up to 180.
    115

    Posted from TSR Mobile
    • Community Assistant
    • Welcome Squad
    Offline

    3
    ReputationRep:
    Yep!
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    Yep!
    yusssssss !!!!

    Posted from TSR Mobile
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    Yep!
    I did something wrong can't figure it out.

    Posted from TSR Mobile
    Attached Images
     
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    Yep!
    I did something wrong can't figure it out.,

    Posted from TSR Mobile
    • Community Assistant
    • Welcome Squad
    Offline

    3
    ReputationRep:
    (Original post by z_o_e)
    I did something wrong can't figure it out.,

    Posted from TSR Mobile
    AC is just hypotenuse, and since you are given the side lengths, it's basic pythagoras to find it.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    AC is just hypotenuse, and since you are given the side lengths, it's basic pythagoras to find it.
    Did these


    Posted from TSR Mobile
    Attached Images
     
    • Community Assistant
    • Welcome Squad
    Offline

    3
    ReputationRep:
    (Original post by z_o_e)
    Did these


    Posted from TSR Mobile
    37 is right but the bearing is wrong because that would mean you are measuring it anticlockwise.

    Bearing tell us that they are measured clockwise from the north line as a 3 digit number.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    37 is right but the bearing is wrong because that would mean you are measuring it anticlockwise.

    Bearing tell us that they are measured clockwise from the north line as a 3 digit number.
    So the answer is 037?

    Posted from TSR Mobile
    • Community Assistant
    • Welcome Squad
    Offline

    3
    ReputationRep:
    (Original post by z_o_e)
    So the answer is 037?

    Posted from TSR Mobile
    No. I meant I agree with your working up until you get 37 degrees. Think about how you can use that to get the bearing by measuring it clockwise from the north.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    No. I meant I agree with your working up until you get 37 degrees. Think about how you can use that to get the bearing by measuring it clockwise from the north.
    217

    Posted from TSR Mobile
    • Community Assistant
    • Welcome Squad
    Offline

    3
    ReputationRep:
    Correct.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RDKGames)
    Correct.


    Posted from TSR Mobile
    Attached Images
     
    • Community Assistant
    • Welcome Squad
    Offline

    3
    ReputationRep:
    How would you approach this?
 
 
 
Poll
Do you honestly judge a book by its cover?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.