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3 years ago

Determine the given rotation please help me :( no one hasn’t helped me

Mathematics

2 answers:

Viktor [21]3 years ago

6 0

Answer:

180 or 90 degrees

Step-by-step explanation:

Mashcka [7]3 years ago

4 0

Answer:

You Could Just Search These Up

Step-by-step explanation:

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Which one is smaller, 2 6/25 or 2 1/8

max2010maxim [7]

Answer:

2 1/8

Step-by-step explanation:

both have 2 as a whole number

now make fraction into decimal

6/25 is 0.24 and and 1/8 is 0.125

therefore 2 1/8 is smaller

8 0

3 years ago

Read 2 more answers

What is the GCF of 28a^3 b and 16ab ? A)4ab B)4a3b C)28ab D)112a3b2

N76 [4]

28a⁴b: 2 · 2 · 7 · a · a · a · a · b
16ab: 2 · 2 · 2 · 2 · a · b

GCF(28a⁴b, 16ab) = 4ab

The answer is A.

7 0

3 years ago

15. If x=a Sin2t (I+Cos2t) and y=b Cos 2t (1-Cos2t) then find dy/dx at =22/7*4

Sav [38]

By the chain rule,

$\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{\mathrm dy}{\mathrm dt}\dfrac{\mathrm dt}{\mathrm dx}\implies\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{\frac{\mathrm dy}{\mathrm dt}}{\frac{\mathrm dx}{\mathrm dt}}$

It looks like we're given

$\begin{cases}x=a\sin(2t)(1+\cos(2t))\\y=b\cos(2t)(1-\cos(2t))\end{cases}$

where a and b are presumably constant.

Recall that

$\cos^2t=\dfrac{1+\cos(2t)}2$

$\sin^2t=\dfrac{1-\cos(2t)}2$

so that

$\begin{cases}x=2a\sin(2t)\cos^2t\\y=2b\cos(2t)\sin^2t\end{cases}$

Then we have

$\dfrac{\mathrm dx}{\mathrm dt}=4a\cos(2t)\cos^2t-4a\sin(2t)\cos t\sin t$

$\dfrac{\mathrm dy}{\mathrm dt}=-4b\sin(2t)\sin^2t+4b\cos(2t)\sin t\cos t$

$\implies\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{4b\cos(2t)\sin t\cos t-4b\sin(2t)\sin^2}{4a\cos(2t)\cos^2t-4a\sin(2t)\cos t\sin t}$

$\implies\boxed{\dfrac{\mathrm dy}{\mathrm dx}=\dfrac ba\tan t}$

where the last reduction follows from dividing through everything by $\cos(2t)\cos^2t$ and simplifying.

I'm not sure at which point you're supposed to evaluate the derivative (22/7*4, as in 88/7? or something else?), so I'll leave that to you.

8 0

3 years ago

How to do this because I don't know my class work

salantis [7]

I assume the answer is 1/4

5 0

4 years ago

Please answer this questions for me

Crazy boy [7]

The player that’s further to the hole I’m so sorry if it’s incorrect

4 0

3 years ago