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
zmey [24]
2 years ago
14

Measuring by using Trigonometry

Mathematics
1 answer:
liberstina [14]2 years ago
3 0

Answer:

x approximately = 11.971, y approximately = 0.837

Step-by-step explanation:

the 12 ft is the hypotenuse of the right angle triangle formed

Cos (theta) = adjacent/hypotenuse

so Cos(4) = x/12, solving for x = 11.971

Sin(theta) = opposite/hypotenuse

so Sin(4) = y/12, solving for y = 0.837

You might be interested in
A rectangle has a length of 3x-5 and a width of 2x+9.
Montano1993 [528]

Step-by-step explanation:

l = 3x - 5

w = 2x + 9

perimeter = 2l + 2w = 2(3x - 5) + 2(2x + 9) =

= 6x - 10 + 4x + 18 = 10x + 8

area = l×w = (3x - 5)(2x + 9) = 6x² + 27x - 10x - 45 =

= 6x² + 17x - 45

8 0
2 years ago
Please help me I’ll mark you as brainliest! Answer quickly pleaseee
Scrat [10]

Answer:

i need the triangle

Step-by-step explanation:

the question is incomplete... show the diagram of the triangle

we can't solve without that

5 0
3 years ago
Plz help me toofree ill give u what u want
kondaur [170]
Surface area = 2(19 x 15) + 2(15 x 13) + 2(13 x 19)
Surface area = 570 + 390 + 494
Surface area = 1454 cm²

---------------------------------------------
Answer: Surface area = 1454 cm²
---------------------------------------------


4 0
3 years ago
Read 2 more answers
Use the distributive property to expand the expression. −(3a3 − 4b2) (12x − 9y − 5)
aalyn [17]
The answer to that is -3a+4b+12x-9y-4
6 0
3 years ago
Write a polynomial of degree 5 with zero x=0,i square root 7, -2i
professor190 [17]

Answer:

P(x)=x^5+11x^3+28x

Step-by-step explanation:

<u>Roots of a polynomial</u>

If we know the roots of a polynomial, say x1,x2,x3,...,xn, we can construct the polynomial using the formula

P(x)=a(x-x_1)(x-x_2)(x-x_3)...(x-x_n)

Where a is an arbitrary constant.

We know three of the roots of the degree-5 polynomial are:

x_1=0;\ x_2=\sqrt{7}\boldsymbol{i}:\ x_3=-2\boldsymbol{i}

We can complete the two remaining roots by knowing the complex roots in a polynomial with real coefficients, always come paired with their conjugates. This means that the fourth and fifth roots are:

x_4=-\sqrt{7}\boldsymbol{i}:\ x_3=+2\boldsymbol{i}

Let's build up the polynomial, assuming a=1:

P(x)=(x-0)(x-\sqrt{7}\boldsymbol{i})(x+\sqrt{7}\boldsymbol{i})(x-2\boldsymbol{i})(x+2\boldsymbol{i})

Since:

(a+b\boldsymbol{i})\cdot (a-b\boldsymbol{i})=a^2+b^2

P(x)=(x)(x^2+7)(x^2+4)

Operating the last two factors:

P(x)=(x)(x^4+11x^2+28)

Operating, we have the required polynomial:

\boxed{P(x)=x^5+11x^3+28x}

7 0
3 years ago
Other questions:
  • A diagram is drawn to scale, so 1.0 cm represents a velocity of 10 m/s. On the diagram, there is a vector 7.0 cm long. What is t
    7·2 answers
  • Explain how to use a number line to compare two integers
    9·1 answer
  • 25 POINTS QUICK!!! could someone please help me with these two problems?? and possibly explain?? i need work too please! 25 POIN
    10·2 answers
  • (3n^2+13n^3+5n)-(7n+4n^3)
    11·1 answer
  • I will give you brainlest and 5 stars if you answer this correctly
    13·2 answers
  • Which equation represents a line which is parallel to the line 7x - y = 4?
    6·1 answer
  • Kailey and Macy paddle a canoe at a rate of 6 miles per hour in still water. They travel downstream for 10 miles, and to their d
    5·1 answer
  • Solve for a.<br> -4a – 2a – 7 = 11<br> a =<br> [?]<br> Not a fraction answer
    9·2 answers
  • HELP PLEASE! I REWARD BRAINLIEST! also no silly answers PLZ
    10·1 answer
  • Elizabeth made a scale drawing of her school's basketball court before devising a winning
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!