Ask question

Ask question

All categories

sweet-ann [11.9K]

3 years ago

9

Evaluate each function. 15) f(n)= n° + 3n?; Find f(-4a²)

1 answer:

coldgirl [10]3 years ago

6 0

Answer:

Step-by-step explanation:

You might be interested in

Angle A is in standard position and terminates in quadrant IV. If sec(A)=4/3, complete the steps to find cot(A).

Butoxors [25]

Answer:

Part A) Use the identity $tan^2(A)+1=sec^2(A)$

Part B) $cot(A)=-\frac{3\sqrt{7}}{7}$

Step-by-step explanation:

we know that

$tan^2(A)+1=sec^2(A)$ ----> by trigonometric identity

we have

$sec(A)=\frac{4}{3}$

substitute in the expression above

$tan^2(A)+1=(\frac{4}{3})^2$

solve for tan(A)

$tan^2(A)+1=\frac{16}{9}$

$tan^2(A)=\frac{16}{9}-1$

$tan^2(A)=\frac{7}{9}$

square root both sides

$tan(A)=\pm\frac{\sqrt{7}}{3}$

Remember that Angle A terminates in quadrant IV

so

The value of tan(A) is negative

$tan(A)=-\frac{\sqrt{7}}{3}$

<em>Find the value of cot(A)</em>

we know that

$cot(A)=\frac{1}{tan(A)}$ ----> is the reciprocal

therefore

$cot(A)=-\frac{3}{\sqrt{7}}$

simplify

$cot(A)=-\frac{3\sqrt{7}}{7}$

6 0

3 years ago

Read 2 more answers

Writh an equation of a line in slope-intercept form for the given conditions.

IceJOKER [234]

Answer:

y=2x+12

Step-by-step explanation:

y-2=2(x-(-5))

y-2=2(x+5)

y-2=2x+10

y=2x+12

5 0

3 years ago

Find the area and perimeter for number 19 and 20 with work please

allsm [11]

I promise if you use the internet it will come up

8 0

3 years ago

Please solve. (1 1/2 x 3 3/4) - ( 2 3/5 / 1 1/2)

Nostrana [21]

For that answer i got 3 -2/120 but I'm not sure about it

5 0

3 years ago

Read 2 more answers

If a1=10 and an=an-1+4 then find the value of a5

tamaranim1 [39]

Answer:

26

Step-by-step explanation:

Each term is the previous with 4 added to it.

a1 = 10, a2 = 14, a3 = 18, a4 = 22, a5 = 26

3 0

2 years ago