trig question. question below

Question

anonymous · Answer

@inkyvoyd sec and ill tell you what my question is. since im already done with the problem

anonymous · Answer

the answer for c was  a wild guess. i may have forgotten something important. do you know why this distance there follows this formula for c

campbell_st · Answer

ok... looking at the question 

isn't arc length 

$$l = r \theta$$

anonymous · Answer

yes.

campbell_st · Answer

so you have the 1st and 2nd parts correct

anonymous · Answer

all of them are correct. just c was a wild guess. and d was just plugging in a number once you found part c. im trying to figure out why c was what it is.

campbell_st · Answer

and (c) is also correct

anonymous · Answer

can you show me your steps on c how you get that. because i thought it would be 1+cos instead of 1-cos

anonymous · Answer

and why is it radius *height?

campbell_st · Answer

well if you start (c) with

r = h + d

then 

d = r - h

and you have h from (b) 

so substituting 

d = r - rcos(@)

d = r(1 - cos(@))

anonymous · Answer

ooooooooooooooooooooh i see. i didnt even notice the first part or even utilize that information.

anonymous · Answer

so obvious now.

campbell_st · Answer

ok... now part(d)

you know from (a) l = r@

so r= l/@

substitute it into (c) and you'll find the answer for (d)

hope it helps

anonymous · Answer

yep, i didnt even consider d+h=r until you said that. thanks for the help. its appreciated.