2 years ago

Which of the following are trigonometric identities? Check all that apply.

Mathematics

1 answer:

lubasha [3.4K]2 years ago

3 0

Answer:

C and D is correct

That's what I think though

You might be interested in

Find the general solution of the given higher-order differential equation. d3u dt3 + d2u dt2 − 2u = 0

STALIN [3.7K]

$\dfrac{\mathrm d^3u}{\mathrm dt^3}+\dfrac{\mathrm d^2u}{\mathrm dt^2}-2u=0$

This ODE has characteristic equation

$r^3+r^2-2=(r^3-r)+(r^2+r-2)=r(r^2-1)+(r+2)(r-1)$

$=(r(r+1)+(r+2))(r-1)=(r^2+2r+2)(r-1)=0$

which has roots at $r=1,-1\pm i$ . Then the characteristic solution to the ODE is

$u(t)=C_1e^t+C_2e^{(-1+i)t}+C_3e^{(-1-i)t}$

$\implies\boxed{u(t)=C_1e^t+C_2e^{-t}\cos t+C_3e^{-t}\sin t}$

6 0

2 years ago

5 stars for most accurate answer

Pani-rosa [81]

The correct answer is B.

The reason they are testing this new sports drink is to see if it will work better, worse, or "differently" as they are putting it! The other answers do not have anything to do with the experiment.

Hope this helps! Would love brainliest trying to get to virtuoso thanks!

4 0

3 years ago

What is 3^ 81^5=3^ please

Korvikt [17]

Answer:

Step-by-step explanation:

5 0

2 years ago

How do u do this ? I'm so confused I really need help

Art [367]

Well what do u need help with can u explain?

5 0

2 years ago

I will give your brainliest for this please

erastova [34]

cos=adj/hyp

=0.5/1.3

CD=0.4

*add CD+BC to find BD

0.4+1.0

BD=1.4cm

6 0

2 years ago

Read 2 more answers