PreCalculus - Trigonometry: The Law of Sines (8 of 15) Finding the Height of the Mountain

In this video I will show how to find the height a mountain while driving toward it.

[EP-rqpn]

I love this example! I'm totally going to get a compass and do this on my next road trip to show off.

[robydurdstick]

Wow there’s a plethora of ways people could solve this problem. The beauty of math is well presented here

[heatherahyoung-shelton]

Excellent demonstration and wonderful bow tie! Take care :)

[izssrbz]

Wow thanks for this, the diagram was so clear, great explanation!

[charlottetaylor]

Im wondering if I was stood at the top of the mountain (assuming I know the height) trying to find the distance between the two cars how would I calculate it? the distance I measure from myself to each car would be different from the top of the mountain than ground level

[emenguyen]

Thank you for the great demonstration!

[alinthecloud]

Did I miss something here? Don't all triangles have to be a total of 180 degrees? How do we 3:03 get 12, 10, and 22 for the angles?

[engineeringstudy]

how we find height of hill ?when degree is not given only one side is given i.e hypotenuse

[kanikalakhani]

what could he have used before finding the height of the mountain?
cosine rule or cosine ratio or sine rule or sine ratio?

[TheAnmolekka]

How can we measure the input ie angle of elevation?

[CBRadi_]

Very well presented keep up the great work

[zeesamuel]

Hi Again, Amazin videos. May I ask where did we get 12 degrees from? Many thanks for your time.

[giovanninicoletti]

Thanks, I am 12 and I skipped a class so I am now in grade 8 and this video helped me with the possible tricky problem that will be in my math test tomorrow!

[ambrielleackerman]

May i ask?..why did you minus the 10 and 22😊

[tomreddle]

thanks for very helpful and create lesson

[mhmus]

h=10 / (tand(90 - 10) - tand(90 - 22))

[theplacebeyondthelies]

sorry but that's the kind of teacher which confuses everybody in the room by complicating the matter. Using tangent makes the equation much simpler!

[rudychan]

Complicated^ My Dear Teacher,
I prefer mine^ :
h = [sinA.sinB/sin(A-B)]. m
h = [sin22°.sin10/sin12°].m
h = 0, 3128×m = 3, 128mi = 16.520ft

[Nicky]

Doh! Mistake - he used 12 degrees instead of 22 degrees in the first part

[Nicky]

Doh! no he didn't... 12 degrees is correct