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3 years ago

What is d/dx(1/sinx) ...?

Mathematics

1 answer:

tester [92]3 years ago

7 0

$\frac{d}{dx} \frac{1}{\sin{x}}= \frac{d}{dx}\sin^{-1}{x}=-1 \frac{d}{dx}\sin{x}=-(-\cos{x})=\cos{x}$

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If f(x) = x² + 7, what is the value of f(4)?

dalvyx [7]

Value of f(4) is $f(4)= 23$ given $f(x)= x^2+7$

Step-by-step explanation:

We are given $f(x)= x^2+7$ and we need to find value of f(4)

Solving:

We will put x=4 and solve the given equation:

$f(x)= x^2+7$

$f(4)= (4)^2+7$

We know (4)^2=16

$f(4)= 16+7$

$f(4)= 23$

So, Value of f(4) is $f(4)= 23$ given $f(x)= x^2+7$

Keywords: Solving Equations

Learn more about Solving Equations at:

#learnwithBrainly

4 0

3 years ago

What equation is the inverse of y=7x^2-10?

tangare [24]

Answer:

Option 2: y = ±sqrt( $\frac{x+10}{7}$ )

Step-by-step explanation:

y = 7x^2 - 10

To find the inverse of a function, you must swap the y and x.

x = 7y^2 - 10

Now I will just simplify to have y by itself on the left hand side.

x + 10 = 7y^2

$\frac{x+10}{7}$ =y^2

sqrt( $\frac{x+10}{7}$ )=±y

y = ±sqrt( $\frac{x+10}{7}$ )

8 0

3 years ago

Using the numbers 8, 6, 4, and 2 write an expression that equals 7.

o-na [289]

8 - (6-4) : 2 = 7
that's it

3 0

3 years ago

Read 2 more answers

Instructions: Given the following image of two parallel lines cut by a transversal, find the value of x.

mash [69]

Answer:

First, these angles are alternate interior angles.

$10x - 5 = 9x + 1$

$x = 6$

Step-by-step explanation:

(10x - 5)° and (9x + 1)° are alternate interior angles. Thus, they are congruent to each other.

Thus, to find x, we will set each angle equal to the other.

$10x - 5 = 9x + 1$

Solve for x. Collect like terms

$10x - 9x = 5 + 1$

$x = 6$

8 0

3 years ago

Ayuda 7×9÷2=<br><br><br><br>note : btw how to get rid of this ad ?

JulijaS [17]

Step-by-step explanation:

7×9÷2

By using the rule of BODMAS , we get

7×9÷2

7×4.5

31.5

5 0

2 years ago

Read 2 more answers