## MaryJSmith 3 years ago Andy is parasailing and is at point A of the towline AB. The point B of the towline is connected to a boat, as shown. What is the length, in feet, of the towline AB?

1. MaryJSmith

2. bluepig148

soh cah toa, basic trig. cos 43 = 500/AB AB = 500/cos 43 approx = 683.6637 feet

3. MaryJSmith

|dw:1333067352819:dw| B) 500 cosec 43 degrees C) 500 sec 43 degrees

4. bluepig148

You can do this yourself...

5. MaryJSmith

so A ?

6. bluepig148

Do you know what cot, sec, and csc mean?

7. MaryJSmith

no

8. bluepig148

What about cotangent, secant, and cosecant.

9. MaryJSmith

i've heard of them but i don't really know what the meaning..

10. bluepig148

But you know what sine, cosine, and tangent (sin, cos, and tan) mean, right?

11. MaryJSmith

no not really .

12. bluepig148

What math are you taking?

13. MaryJSmith

it's somewhere in my text book but i don't understand it .

14. MaryJSmith

i'm taking 10th grade geometry .

15. bluepig148

So you don't know how to use trig functions (sin, cos, tan, etc...)? I can link you to some good videos if you want.

16. MaryJSmith

Please do :) I need all the help I can get !!

17. MaryJSmith

My finals are coming up at the end of next month !

18. bluepig148

http://www.khanacademy.org/math/trigonometry/v/basic-trigonometry Start there and click "next video" for as long as you need to. This is the very beginning of the trigonometry playlist, and this guy explains things really well. You can go to the main site to see a bunch of other vids on a ton of other topics (there's geometry in there too). I think after watching the first one you'll remember what your teacher said in class, so: cosecant x = csc x = 1/sin x secant x = sec x = 1/cos x cotangent x = cot x = 1/tan x I dunno when he introduces those ideas. Very simple though when you know what sine, cosine, and tangent are though. Good luck on your final!

19. MaryJSmith

thank you so much :)

20. bluepig148

No problem.

21. Directrix

cos 43 = 500/AB AB = 500/ [cos 43] -----> which is equivalent to C) 500 sec 43 degrees --> Answer AB = 683.664