Trigonometry: How TALL is the BUILDING? Let’s solve step-by-step

TabletClass Math:


Math Notes:

[rickguerrero]

7 minutes of video before you start to solve the problem. When I see your videos pop into my feed, I have begun to start them in the middle to see if any progress is being made. I move up 1 mi Ute at a time until I see math being done. Then I start watching.

[MarcusP]

I learned trig ratios in the navy 50 years ago with this mnemonic, and I find it impossible to forget them:
Sally Can Tell Oscar Has A Hard On Always.
S=O/H
C=A/H
T=O/A
A G-rated version replaces Hard with Hat.

[xevious]

This video reminded me of a Physics 1 project we did using the cardboard from a paper towel roll, a protractor, and some string. Thank you for the vid.

[wantsomecandies]

It would be helpful if you could make a video on Angle of depression too.

[vinhhuynh]

Basic Trigonometry; (Tan= Sin/ cos), y=height; x=500 ft, tan 20 = y/500 ft; y=500ft * tan 20=181.98 ft=height

[jeffp]

Flag pole height, measuring shadow length and angle of the Sun problem

[xr]

thank you very much. but how can we find the angle in real life

[gusdogbrownlab]

My old mate Pythagoras for me! 500/4=125 so each unit of side is 125. So for the height 125x3=375 and the other side will be 5x125=625. Then you don't have to bother with the angle. so you have 375 squared = 140625....500 squared =250000 add these and you get 390625 square root of this is 625

[DarVV]

Tangens 20° = x/ 500, we need math tables with tangens of known (angles other than 0, 30, 45, 60 and 90°) and we have the answer. X = how tall?

[lamper]

We had those tables in the back of the book. Trig for us was just a brief part of Algebra 2 . We NEVER were told to take notes.

[submarinerg]

How do you calculate the 20 degree angle?

[ML-hsld]

Too much off topic talking. Get to the point.

[KathyW]

6 minutes before you actually got into the lesson. Really?

[PreservationEnthusiast]

500*tan(20) = 181.985 ft approx

Trivial... it does not take 12 minutes to explain!

[freefreepalestine]

try measuring the height of the sun during the southern solstice from 50 degrees south and noth

[jeffhester]

Someone solve this problem? 2 points one half inch apart in a straight line along the surface of a 2 in circle. What is the distance between the two points along the circumference and how to determine that.

[ripironman]

5:20 is when the video really starts.

[OuryLN]

This is how they determine the height of the sun and moon

[klangdownab]

Walk towards the building until the angle 45degrees distance from the building is the same as the height…

[slshusker]

There were 48 people on the bus when it left the depot.