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anonymous
 one year ago
I need help, but I think I understand most of it.
anonymous
 one year ago
I need help, but I think I understand most of it.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0From a boat on the lake, the angle of elevation to the top of a cliff is 18°41'. If the base of the cliff is 991 feet from the boat, how high is the cliff (to the nearest foot)?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So I already know I need to use tan

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2you should have something like this drawn up dw:1440632228679:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2it should be tan(18°41') = h/991

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2tan(angle) = opp/adj dw:1440632425483:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Does 18'41 mean the same as 18.41?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2the `41'` means "41 arcminutes". Sometimes the book will drop the "arc" and just say "41 minutes"

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2Rule: 1 degree = 60 arcminutes think of it as 60 minutes in an hour

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2divide both sides of `1 degree = 60 arcminutes` by 60 to get (1/60) degree = 1 arcminute then multiply both sides by 41 to get (41/60) degree = 41 arcminutes

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0hmm actually, my calculator takes the minutes for the trig functions

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but you could convert it to decimals, and just use the flat degree

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2so that means `18°41'` is equivalent to `18.6833°` approximately

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\tan (18.6833)=\frac{ x }{ 991 }\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Then I just solve for x

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2what value of x do you get

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2yep I'm getting 335.113085763609 which rounds to 335

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0mhm Thank you for the help

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2you're welcome
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