A car is moving at 65 miles per hour. How many feet can it travel in one second?
2 answers:
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Answer:
Step-by-step explanation:
Use SOH CAH TOA to recall how the trig functions fit on a triangle
SOH: Sin(Ф)= Opp / Hyp
CAH: Cos(Ф)= Adj / Hyp
TOA: Tan(Ф) = Opp / Adj
use Cos for y .... b/c we see that function above has all the pieces we are going to work with
use Sin for x .. for the same reason above
Cos(30) = y / 4
4Cos(30) = y
4/2 = y
2 = y
leave the answer for y like that.. it's in 'exact" form
now for x
Sin(30) = x / 4
4Sin(30) = x
4* 1/2 = x
2 = x
and leave your answer for x like that as it's in it's exact form. :)
oh and I see the answer in the list.. do you? :)
