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SIZIF [17.4K]
2 years ago
8

Need help with trig

Mathematics
1 answer:
Sedaia [141]2 years ago
5 0
SinA= 16/20= 4/5=0.8 degree
cosA=12/20=3/5=0.6 degree
tanA=16/12= 4/3=1.33 degree
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3 years ago
One number is 3 less than a second number. Twice the second number is 14 more than 3 times the first. Find the two numbers
Butoxors [25]

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8 0
2 years ago
Can someone help me?
Oxana [17]

Answer:

Step-by-step explanation:

To start calculating, we first need to make some proof.

Firstly, since AB = AC, we know that ΔABC is isosceles, which means that ∠ABC = ∠ACB.

Now, looking only to ΔBDE and ΔCDF, we can see that they are similar, because the two of its angles are congruent:

∠BED=∠CFD

∠DBE=∠DCF

To make it easier to visualize which are the corresponding vertexes, we can draw them like this:

And we need to remember that BC is 24, so:

BD+CD=24

Since the triangles are similar, their corresponding sides have constant ratio, which we can calculate from the corresponding sides DE and CF:

r=\frac{CF}{DE} =\frac{7.5}{4.5} =\frac{5}{3}

This ratio is the same for the other corresponding sides, so we can apply that for BD and CD:

r=\frac{CD}{BD} =\frac{5}{3}\\
 \frac{BD}{CD}=\frac{3}{5}  \\\\
BD=\frac{3}{5} Cd

Thus, the measure of CF is approximately 13, alternative D.

3 0
2 years ago
What would you multiply by to find 120% of a number?
Darina [25.2K]
You would multiply by 1.2 for example if you wanted to find 120% of 100 you would multiply by 1.2 and get 120
3 0
2 years ago
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