Question

Refresh my memory on how to do these please?

Answer 1

???

Answer 2

Can you post what you need help with please. That's the only way we can help.

Answer 3

Sorry, I was doing something. Just calm down. :p
A person is watching a boat from the top of a lighthouse. The boat is approaching the lighthouse directly. When first noticed the angle of depression to the boat is 14°52'. When the boat stops, the angle of depression is 45°10'. The lighthouse is 200 feet tall. How far did the boat travel from when it was first noticed until it stopped? Round your answer to the hundredths place.

Answer 4

The ship is 753.41894586679260033786599409599 feet away at the start: a / Tan (A)
where a is the height of the right triangle 200 ft and A is the starting angle of depression 14.866666666666666666666666666667.

The ship is 198.83981872353961136157012429635 feet away at the end: a / Tan (A)
where a is the height of the right triangle 200 ft and A is the starting angle of depression 45.166666666666666666666666666667.

So the ship traveled the distance between the two: 554.57912714325298897629586979955 or rounded:

554.58 feet

Answer 5

I can't remember how to change the 45deg52ft. to just degrees...

Answer 6

@ScarlettBlack

Answer 7

If you think about it as a triangle. you're saying 45deg52ft
You need to tell me the function. is that multiplying?
Is the answer in degrees or feet also is the question multiple choice?

Answer 8

It's a fill in question, no choices. You got the answer right, I've done this question before, I just don't remember how...

Answer 9

?

Answer 10

Did you see what I wrote above the answer?

Answer 11

Yes, but you didn't show how you changed it, you already had it changed to 14. something.

Answer 12

200(cot(14+52/60)-cot(45+10/60))

you would enter it into a calculator like this

Answer 13

the 14 comes from what you said about 14 degrees earlier

Answer 14

Refer to the solution attached. Mathematica 9 Home Edition was used for the calculations.

Answer 15

Oh, yeah! Now I remember. Thanks! God bless you guys! <3

Answer 16

sure