1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zhannawk [14.2K]
3 years ago
10

I am awarding this a lot of points because 1, it's calculus and I know no one really wants to do that, and 2 I need actual answe

rs for this. Initially I posted some of these questions but for a lesser point value and now I realize that I won't get the most accurate answers for that so more points! Anyway, to get branliest on this you have to at least give me some reasoning/proof for why this is right so I know you didn't just google this.
So this set of questions is on derivatives of trigonometric and logarithmic functions, and two of them are implicit functions.
1. Find the derivative when y = Ln (sinh 2x)
A. 2 cosh 2x, B. 2 coth 2x, C. 2 sech 2x, D. 2 csch 2x

2. Find the derivative when sinh 3y = cos 2x
A. - 2 sin 2x, B. - 2 (sin 2x/sinh 3y), C. -2/3 tan (2x/3y), D. - (2 sin 2x/3 cosh 3y)

3. Find the derivative when y = sin^2 (4x) cos (3x)
A. 8 sin (4x) cos (3x) - 3 sin^2 (4x) sin (3x)
B. 8 cos (4x) cos (3x) - 3 sin^2 (4x) sin (3x)
C. 8 sin (4x) cos (4x) cos (3x) - 3 sin^2 (4x) sin (3x)
D. 8 sin (4x) cos (4x) cos (3x) - 3 sin^2 (4x) sin (3x) cos (3x)

4. Find the derivative if Ln (x + y) = e^x/y (e is raised to the power of x/y by the way, it isn't e raised to the power of x then over y)
the answer options are way too confusing to type up and have them make any sense so I'm not even going to try on this one

Thank you so much!
Mathematics
1 answer:
ElenaW [278]3 years ago
3 0
1. y=\ln(\sinh2x)\implies y'=\dfrac{(\sinh2x)'}{\sinh2x}

Recall that (\sinh x)'=\cosh x, which follows from the definition of the hyperbolic functions:

(\sinh x)'=\left(\dfrac{e^x-e^{-x}}2\right)'=\dfrac{e^x+e^{-x}}2=\cosh x

so by the chain rule, the derivative reduces to

y'=\dfrac{2\cosh2x}{\sinh2x}=2\coth2x

2. \sinh3y=\cos2x\implies(\sinh3y)'=(\cos2x)'\implies3\cosh3y\,y'=-2\sin2x

The derivative on the left side follows from the same principle as in the first problem. Solving for y', you get

y'=-\dfrac{2\sin2x}{3\cosh3y}

3. y=\sin^24x\cos3x

Product rule:

y'=(\sin^24x)'\cos3x+\sin^24x(\cos3x)'

then power (for the first derivative) and chain rules:

y'=2\sin4x(4\cos4x)\cos3x-3\sin^24x\sin3x
y'=8\sin4x\cos4x\cos3x-3\sin^24x\sin3x

This can be reduced a bit more, but you can stop here since this is one of the answer choices.

4. \ln(x+y)=e^{x/y}

Chain rule for both sides:

(\ln(x+y))'=\left(e^{x/y}\right)'\implies\dfrac{(x+y)'}{x+y}=\left(\dfrac xy\right)'e^{x/y}
\implies\dfrac{1+y'}{x+y}=\left(\dfrac{y-xy'}y^2\right)e^{x/y}

I would stop here, but maybe your answer choices are solutions for y' explicitly. If that's the case, solving y' is a purely algebraic exercise.
You might be interested in
What are the factors of the expression (y-2)(x+3)?
masya89 [10]

Answer:

Something which is multiplied by something else. A factor can be a number, variable, term, or a longer expression

with this information we can conclude that the numbers  2 and 3 are factors

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
How many of the students interviewed do not collect sports cards
nasty-shy [4]

huh?

Step-by-step explanation:

3 0
2 years ago
Whats the value of b : -8/5b=8
Rus_ich [418]

Answer:

The value of b is -5

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Connor bought a baseball card eight years ago that has depreciated (goes down in value) by $120 since he purchased it. Find the
Flura [38]

Answer:

-$15

Step-by-step explanation:

To find the average yearly change, divide -120 by 8, since it has decreased by $120 over 8 years.

-120/8

= -15

So, the average yearly change in the value of the card is -$15

6 0
3 years ago
Read 2 more answers
Randomly distributing 45 pencils and 35 markers to his students. what is the probability that the first item he hands out will
Dominik [7]
If he hands out pencils will be 45/80 =
If he hands out markers will be 35/80
3 0
3 years ago
Other questions:
  • Can someone show me how to find the product of 3square-root(4) * square-root(3)?
    15·1 answer
  • What goes into 75 and 25
    8·2 answers
  • Find the values of c and d​
    10·1 answer
  • Cartavious started a lawn mowing business, that he works on weekends. He mowed 8 lawns on Saturday, and a few more on Sunday. if
    5·1 answer
  • Sorry if it is not clear the question asks, Two squares of side x cm are removed from a square of side 3x cm as shown
    15·1 answer
  • Increase £500 by 3.2% how do you work it out
    13·1 answer
  • I accedently made this so uea WOOO
    14·1 answer
  • -8 X-3x = -6 + 5 x<br> How to solve
    8·1 answer
  • Gieo một con xúc xắc hai lần. Tìm xác suất để được tổng số chấm của hai mặt bằng 8?
    5·1 answer
  • Find the missing side lengths leave your answerss as radicals??
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!