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earnstyle [38]
3 years ago
10

Using the right angle below find the cosine of angle A.

Mathematics
2 answers:
Rasek [7]3 years ago
8 0

I hope this helps you

CosA=basement /hypothenus

CosA=8/10=0.8

Ket [755]3 years ago
5 0

Answer:

0.8 or 4/5

Step-by-step explanation:

Cos(A) = adjacent/hypotenuse

= 8/10 = 4/5 = 0.8

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Evaluate the line integral ∫cf⋅dr, where f(x,y,z)=5xi−4yj+3zk and c is given by the vector function r(t)=⟨sint,cost,t⟩, 0≤t≤3π/2
Katena32 [7]

WIth the parameterization

\mathbf r(t)=\langle\sin t,\cos t,t\rangle

we end up with

\mathbf f(\mathbf r(t))=\mathbf f(\sin t,\cos t,t)=5\sin t\,\mathbf i-4\cos t\,\mathbf j+3t\,\mathbf k

We also have

\mathrm d\mathbf r=\mathbf r'(t)\,\mathrm dt=\langle\cos t,-\sin t,1\rangle\,\mathrm dt

So in the line integral, we get

\displaystyle\int_{\mathcal C}\mathbf f\cdot\mathrm d\mathbf r=\int_{t=0}^{t=3\pi/2}\mathbf f(\mathbf r(t))\cdot\mathbf r'(t)\,\mathrm dt

=\displaystyle\int_{t=0}^{t=3\pi/2}(9\sin t\cos t+3t)\,\mathrm dt=\frac98(3\pi^2+4)

8 0
3 years ago
What is the answer to -7 =-5x+3​
oee [108]

Answer:

-10=5x

Hope I Helped

3 0
3 years ago
Organize the given volumes of cubes as either a perfect cube or not-perfect cube.
stiks02 [169]

Answer:

343m3,8m3,1000m3 for Perfect squares

300m3,9m3,900m3 for Not-perfect squares

Step-by-step explanation:

Did an assignment on edge

4 0
3 years ago
What is the value of x in the triangle below
Musya8 [376]

Answer:

x = 71°

Step-by-step explanation:

The angles of any triangle will always amount to 180°.

Which means: (Angle of A) + (Angle of B) + (Angle of C) = 180°

Placing the known values into that equation will always let you know the third angle of any triangle.

(Angle of A) + (Angle of B) + (Angle of C) = 180°

(38°) + (71°) + (x) = 180°

109° + x = 180°

Solve for x by subtracting 109° from both sides

x = 180° - 109°

x = 71°

OR you can add the other two known angles 38° + 71° = 109°

This subtracted from the 180°

180° - 109° = 71°

5 0
3 years ago
40.5 percent of a certain number is 65. what is the number?
NNADVOKAT [17]
The best way to do this is to set up a proportion

40.5        65
------- = -------
100          x

then cross multiply and divide

100 times 65=6500/40.5=160.5

the number is 160.5

I hope I've helped!
6 0
3 years ago
Read 2 more answers
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