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
raketka [301]
3 years ago
10

Which relationship in the triangle must be true?

Mathematics
1 answer:
Paul [167]3 years ago
7 0

We'll assume this is an arbitrary triangle ABC.


A) No, the sines of two different angles can be whatever they want


B) sin(B)=cos(90-B)


Yes, that's always true. The "co" in cosine means "complementary" as in the complementary angle, which adds to 90. So the sine of an angle is the cosine of the complementary angle.


C) No, the correct identity is sin(180-B)=sin B. Supplementary angles share the same sine.


D) Just like A, different triangle angles often have different cosines.


Answer: Choice B



You might be interested in
91/100 in simplest form
otez555 [7]
91/100 is already in simplest form
3 0
2 years ago
Write an equation of the line with the given slope and y-intercept.
Snezhnost [94]

Answer:

y=\frac{4}{3}x

Step-by-step explanation:

general slope intercept equation of a straight line is given as

y=mx+b

where m is slope and b is y-intercept

here  

m=\frac{4}{3}  

and

b=0

8 0
3 years ago
Based on the diagram shown, all of the following are true statements except
ira [324]

You are correct. The answer is choice C.

The other choices A, B, D have each side add up to 180 degrees either because the angles are a linear pair (adjacent and supplementary) or because the angles are same side interior angles. Same side interior angles are supplementary if a transversal line cuts through a pair of parallel lines as so happens in this diagram.

6 0
3 years ago
Read 2 more answers
Can you help me on this?
Illusion [34]

Answer:

y = 30

Step-by-step explanation:

We can use ratio's to solve this

40        20

-----  = -----------

100       20 + y


Using cross products

40 * (20+y) = 20*100

Distribute

800 + 40y = 2000

Subtract 800 from each side

40y = 2000-800

40y = 1200

Divide by 40

y = 1200/40

y =30

5 0
3 years ago
(−7, 5) and (7, 5) on the coordinate grid below show the positions of two players of a football team: A coordinate plane is show
galina1969 [7]

Answer:

Player 1's position is Player 2's position reflected across the y-axis; only the signs of the x-coordinates of Player 1 and Player 2 are different.

Step-by-step explanation:

When you reflect a point (x, y) across the y-axis, the y-coordinate remains the same, but the x-coordinate gets the opposite sign: it becomes (-x, y).

Thus, if a point P, say, (7,5) is reflected across the y-axis, its reflection P' becomes(-7,5)

3 0
3 years ago
Other questions:
  • At a store clearance, a woman spent less than $200 on shirts that were labeled $15 each. How many shirts did she buy? Identify t
    15·1 answer
  • Which relation is a function?
    11·1 answer
  • Emma was building a tree house in the park he had a large piece of wood that was 15 5/6 long that he cut into 6 equal pieces wha
    7·1 answer
  • Convert 11pi/15 to degrees
    6·1 answer
  • A database system assigns a 32-character ID to each record, where each character is either a number from 0 to 9 or a letter from
    9·1 answer
  • What is 3.1 divided by 10.261
    7·1 answer
  • Suppose y varies directly with x. If y=6 when y=-2, find x when y=15.
    10·1 answer
  • Round 5/8 to the nearest whole number ​
    10·1 answer
  • . Solve for the missing value.
    6·2 answers
  • Miss Robinson has 750 stickers. Everyday she gives out 100 stickers. How many days till she has 250?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!