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3 years ago

5

Which equation should be used to graph y=sec^-1(x) on a calculator ?

1 answer:

erastova [34]3 years ago

4 0

Arcsecant or arcsec or sec⁻¹ is an inverse trigonometric function. And many calculators don't have a key for them because they can be calculated with basic trigonometric functions like so:

sec⁻¹(x)=cos⁻¹(1/x).

So the correct answer is the fourth one: y=cos⁻¹(1/x).

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stellarik [79]

Answer: 9x - 485/81

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6 0

3 years ago

A single card is drawn from a standard 52 card deck. Work out the probability of choosing "an ace". Give your answer in its simp

Furkat [3]

Answer:

1/13

Step-by-step explanation:

Total cards = 52

No: of aces in the cards= 4

Probability = 4/52 = 1/13

I hope im right!!1

5 0

2 years ago

What similarity statement can you write relating the three triangles in the diagram?

GarryVolchara [31]

Answer:

They are both right-angled triangles.

Step-by-step explanation:

8 0

2 years ago

Solve equation, check for extraneous solutions

fiasKO [112]

Start with

$1=\dfrac{1}{n^2}+\dfrac{n^2-4n-5}{3n^2}$

We observe that both fractions are not defined if $n=0$ . So, we will assume $n \neq 0$ .

We multiply both numerator and denominator of the first fraction by 3 and we sum the two fractions:

$1=\dfrac{3}{3n^2}+\dfrac{n^2-4n-5}{3n^2} = \dfrac{n^2-4n-2}{3n^2}$

We multiply both sides by $3n^2$ :

$n^2-4n-2=3n^2$

We move everything to one side and solve the quadratic equation:

$2n^2+4n+2=0 \iff 2(n^2+2n+1)=0 \iff 2(n+1)^2=0 \iff n+1=0 \iff n=-1$

We check the solution:

$1=\dfrac{1}{1}+\dfrac{1+4-5}{3} \iff 1 = 1+0$

which is true

8 0

3 years ago

I need help with this problem and if you can help me I would definitely appreciate it :)

Georgia [21]

Answer:

a. x=2, y=13

b. x=14, y=25

c. x=−4, y=13

Step-by-step explanation:

3 0

2 years ago