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sonyfan
17.03.2021 •
Mathematics
The angle 01 is located in Quadrant IV, and sin(01) = -24/ 25
What is the value of cos(01)?
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Ответ:
Step-by-step explanation:
We can solve that using this identity,
plug in -24/25 from x in sin
Since cos is positve in quadrant 4, the answer is 7/25.
Ответ:
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
then
Sin(Ф) = -![\frac{24}{25}](/tpl/images/1194/4286/898a8.png)
find the angle Ф
Ф = arcSin ( -
)
Ф = -73.739795°
so an angle measured clock wise from x axis at zero°
now use cos(Ф) = x/ 25 to find x
25* cos( -73.739795°) = x
7 = x :o wow... exactly? :P nice
cos(Ф) = 7/25 I think that's what they wanted to know
also I noted my calculator tried to find the fraction of 0.2800000049 and couldn't, but then I just put in 0.28 and it found that to be 7/25 :0 so I think we're spot on :)
Ответ:
$7 + $0.20p = $5 + $0.30p
Step-by-step explanation:
UPS charges $7 for the first pound and $0.20 for each additional pound.
FedEx charges $5 for the first pound and $0.30 for each additional pound.
Let's take the number of additional pounds that will make UPS and FedEx cost the same to be p.
$7 + $0.20p = $5 + $0.30p
$7 - $5 = $0.30p - $0.20p
$2 = $0.10p
p =
= 20 additional pounds