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
Lady bird [3.3K]
2 years ago
5

Find the area of the triangle below.

Mathematics
1 answer:
gulaghasi [49]2 years ago
8 0

Answer:

Gọi AH là đường cao kẻ từ A đến BC

Xét tam giác AHC vuông tại H

Suy ra AH = HC. cotA= 9.cot35° = 12,9

Xét tam giác AHB vuông tại H

Suy ra BH = AH.tanA = 12,9.tan61°=23,37

Ta có BC= HC+ HB= 9+23,27 =32,27

Diện tích tam giác ABC = 1/2 × AH ×BC= 1/2 ×12,9×32,27=208,1415

You might be interested in
Please answer this question
USPshnik [31]

Answer:

C - The relationship represents a function because each input gives one unique output.

Step-by-step explanation:

To see if it is a function we can do the line test where we have a vertical line and "drag" it along the line. As long as it only hits the line once in every situation it is a function! We can see this passes and therefore the answer is c.

(why is it not d? you can have a non-linear line, but still have a function)

4 0
2 years ago
Consider the line y=9x-1.
OLEGan [10]

Step-by-step explanation:

Slope=9

i)

y−y1=m(x−x1)

When line is parallel

y+5=9(x-6)

y+5 = 9x - 54

<h3>59 = 9x-y </h3>

When line is perpendicular

y+5=-1/9(x-6)

9(y+5)= -1(x-6)

9y + 45 = -x+6

<h3>x+9y = -39</h3>

<h2>MARK ME AS BRAINLIST </h2>
5 0
2 years ago
PLEASE HELP ME ASAP!!!!!!!!
Svetlanka [38]
Wouldn't it be B ??? Hope this is right:) can you take a look at mine??
5 0
3 years ago
Read 2 more answers
Plz prove this for me.....
s344n2d4d5 [400]

I've answered your other question as well.

Step-by-step explanation:

Since the identity is true whether the angle x is measured in degrees, radians, gradians (indeed, anything else you care to concoct), I’ll omit the ‘degrees’ sign.

Using the binomial theorem, (a+b)3=a3+3a2b+3ab2+b3

⇒a3+b3=(a+b)3−3a2b−3ab2=(a+b)3−3(a+b)ab

Substituting a=sin2(x) and b=cos2(x), we have:

sin6(x)+cos6(x)=(sin2(x)+cos2(x))3−3(sin2(x)+cos2(x))sin2(x)cos2(x)

Using the trigonometric identity cos2(x)+sin2(x)=1, your expression simplifies to:

sin6(x)+cos6(x)=1−3sin2(x)cos2(x)

From the double angle formula for the sine function, sin(2x)=2sin(x)cos(x)⇒sin(x)cos(x)=0.5sin(2x)

Meaning the expression can be rewritten as:

sin6(x)+cos6(x)=1−0.75sin2(2x)=1−34sin2(2x)

3 0
3 years ago
Please help i’m sorry!!! 15 points again!
morpeh [17]

Answer:

Guess I'll agree with the other person.

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • Someone help me solve this step by step and please answer within 20 minutes
    9·2 answers
  • Solve the equation 3x - 7y equals -28 for y
    6·1 answer
  • How would I solve (x-3)(3x+5)
    9·1 answer
  • PLEASE HELP
    14·1 answer
  • Order of operations kbesbeienesbe
    8·1 answer
  • Order the following numbers from least to greatest...
    15·1 answer
  • Someone plz write out the answer I’m confused!
    7·1 answer
  • Somebody help please
    5·2 answers
  • POSSIBLE POINTS: 8
    13·1 answer
  • Plzzzz help Lia brought 21 shirts and plants. Her total was $357. Pants cost $25 each, and shirts cost $14.50 each. How many of
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!