Thread: 3d problems

Can someone help me with this question?

Standing due south of a tower 50 m high, the angle of elevation of the top is 26◦.What is the angle of elevation after walking a distance 120 m due east?

The question has me confused so I can't draw a diagram.

Ok this problem has to be done in a few parts. A diagram will really help here.

Firstly find the horizontal length from the tower before moving eastward.

You get Do you know why?

Now using pythagora's thm, find the horizontal distance from the tower with the 120m and the value you just found. What do you get?

Hi pickslides.

I understand the first part:



So x will be the horizontal length you're talking about and C is the thing standing due south.

mm.. After thinking about your post I drew this diagram:



T is tower, x is the horizontal distance in the previous diagram and b will be the distance from the tower to the location after moving 120m due east.

After that we can make b the base of a right-angled triangle and T the height, so it will look like this:



Theta will be our answer

So



Then we can use pythag...



Now we know two sides of the last triangle...







:S

Sounds good to me!