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
docker41 [41]
1 year ago
6

26. Julie says that sin A/cos A = tan A and sin B / cos B = tan B. Use the triangle shown to prove

Mathematics
1 answer:
PSYCHO15rus [73]1 year ago
5 0

Julie is correct because:

\frac{\sin A}{\tan A}=\frac{a/c}{b/c}=a/b=\tan A \\ \\ \frac{\sin B}{\cos B}=\frac{b/c}{a/c}=b/a =\tan B

You might be interested in
The base of a triangle is 7 inches more than 4 times the height. If the area of the triangle is 93 square inches, find the base
Galina-37 [17]

Answer:

Step-by-step explanation:

Let the height = h

Let the base = 4h + 7

Area of a triangle = 1/2 * b * h

Area = 93 square inches

1/2 * (4h + 7)* h = 93            Multiply both sides by 2

(4h + 7) * h = 93*2

(4h + 7)*h = 186                    Remove the brackets

4h^2 + 7h = 186                   Subtract 186 from both sides.

4h^2 + 7h - 186 = 0

Use the quadratic formula to solve

a = 4

b = 7

c = - 186

x1 = (-7 + sqrt(7^2 - 4*4*(-186) ) /2*4

x1 = (-7 + sqrt(49 - 16*(-186)) / 8

x1 = (-7 + sqrt(49 + 2976)) / 8

x1 = (-7 + sqrt(3025)) / 8

x1 = (-7 +55 ) / 8

x1 = (48)/8

x1 = 6

There is another root, but it has to be minus and therefore cannot be used as a length. x2 = - 7.75

h = 6

b = 4*6 + 7 = 31

Check

Area = 1/2 * b * h

Area = 1/2 * 31 * 6

Area = 1/2 *186

Area = 93 which is what we were given so the answer is correct.

4 0
2 years ago
What is the sum of the first 6 terms of the series <br> -1+4-16+...
Romashka [77]

Answer:

819

Step-by-step explanation:

Givens

  • a = -1
  • r = - 4
  • n = 6

Formula

Sum = a(1 - r^n) / ( 1 - r)

Sum = -1(1 - (-4)^6 / (1 - -4)

Sum = -1 (1 - 4096) / 5

Sum = -1 (- 4095 ) / 5

Sum = 819

4 0
3 years ago
A dance class consists of 22 students, of which 10 are women and 12 are men. if 5 men and 5 women are to be chosen and then pair
Bad White [126]
2 pairs are possible with this
6 0
1 year ago
Whats the answer for this <br> 4b²+20b+25
WITCHER [35]
4b²+20b+25=0

Divide everything by 4 

b²+5b+ 6.25=0 

use the quadratic formula 
x= (-b+ or - √b²-4ac) /2a
x= (-5 + or - √5²-4*1*6.25) /2(1)
x= -5/2 so
in this case, b= -5/2

7 0
3 years ago
How many dogs are there in the world?
AleksandrR [38]

Answer:

900 million.

Step-by-step explanation:

It's estimated that there are 900 million dogs in the world, as of 2018.

7 0
3 years ago
Read 2 more answers
Other questions:
  • A rental bus company charges $56 a day for a bus as well as charging a one time fee of $15. Write an equation for the cost in do
    11·1 answer
  • The sum of two numbers is 56,and their difference is 10.What are the numbers?
    15·1 answer
  • Rectangle TUVW is on a coordinate plane at T (a,b),U(a+2,b+2),V(a+5,b-1), and W (a+3,b-3). What is the slope of the line that is
    14·1 answer
  • raymond just got done jumping at super bounce trampoline center. the total cost of his session was$43.25 he had to pay a $7 entr
    13·2 answers
  • 4 – 2( x – 3 ) = 2 4
    15·2 answers
  • HELP PLZ. ASAP I need an answer.
    12·1 answer
  • If a cross country runner covers a distance of 287 meters in 154 seconds what is her speed?
    7·1 answer
  • 50% ÷ 2 <br><br>First answer gets Brainliest​
    6·1 answer
  • Help me please I need help on this I do not get it at all
    5·1 answer
  • Solve the system of linear equations by elimination.<br><br> 2x+5y=16<br> 3x−5y=−1<br><br> Get (x,y)
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!