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
Archy [21]
2 years ago
15

Which relationship in the triangle must be true ?

Mathematics
2 answers:
Inga [223]2 years ago
4 0

Answer:

option B

Step-by-step explanation:

from the given options

a)      sin (B)  = sin (A)

b)      sin (B ) = cos (90° - B)

        cos (90° - B ) = Sin B

c)       cos  (B ) =  sin(180° - B)

         sin(180° - B) = sin (B)

d)        cos (B)  = cos(A)

so, we can clearly see from the above solution that option B is correct.

As 90° - B is in first quadrant and in first quadrant sign of cos dose not change  and 90 is multiple of odd so 'cos' changes to 'sin'

Ivan2 years ago
3 0

Answer:

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

Step-by-step explanation:

That cofunction identity is the one you looking for...choice B.

If you aren't convinced or don't know that identity, then maybe this will help:

90-B is actually the same thing as saying A for this right triangle since A+B=90.

So choice B basically says sin(B)=cos(A)

Well let's find both sin(B) and cos(A)

sin(B)=b/c

cos(A)=b/c

Those are the same ratios!

So they are equal!

You might be interested in
Classify the following as discrete or continuous random variables.
Elena-2011 [213]

Answer:

A discrete variable is a variable that can only take some selected given values from a given set, like x ∈ {x₁, x₂, ..., xₙ}

While a continuous variable can take any value in the range, like x ∈ {x₁, xₙ}.

1)  The weight of bags of apples, with 10 apples in each bag.

Here the weight depends on the number of apples in the bag, and we can have only whole numbers of apples in the bag, so this is clearly a discrete variable.

2) The number of times required for a modem to dial an internet provider before connecting.

Same as before, here we can have only a whole number of attempts, so this set is discrete.

3) Out of 10 times connecting to an internet provider, the average number of attempts necessary before connecting.

Here we will have an average of 10 integer numbers:

M = \frac{x_1 + x_2 + ... + x_{10}}{10}

so here we have a kinda dense set of possible values, so we can think of this as a continuous variable.

4)  A pair of dice is rolled, and the sum to appear on the dice is recorded.

Here the possible values are whole numbers again, so we can not have values like 3.5, so again, this is a discrete variable.

8 0
3 years ago
Raina wants to paint the ceiling of her restaurant. The ceiling is in the shape of a square. Its side lengths are 55 feet. Suppo
Ksju [112]

area of the ceiling = 55 x 55 = 3025 square feet

 3025/275 = 11 cans

8 0
3 years ago
Shifting a graph vertically and horizontally is only possible for certain types of functions.
dusya [7]

Answer:

B.

Step-by-step explanation:

6 0
3 years ago
8) Shawna had $20 to spend on six pencils. After buying them she had
Brums [2.3K]

It cost 2 dollers each.

3 0
3 years ago
Gabi tried to solve an equation step by step.<br> 0.1(0.5m+6)=2
agasfer [191]

Answer:

m=28

Step-by-step explanation:

0.1(0.5m+6)=2

Distribute

.05m +.6 =2

Subtract .6 from each side  

.05m +.6-.6 = 2-.6

.05m = 1.4

Divide each side by .05

.05m/.05 = 1.4/.05

m = 28

6 0
3 years ago
Read 2 more answers
Other questions:
  • Please answer quickly! A recipe asks for 1/3 cup of nuts. How many nuts are needed to make 1/4 of the recipe?
    7·1 answer
  • Multiply the binomials (5x + 3) and (2x + 4).
    7·2 answers
  • What is NKM?? I don’t know what to do!
    13·1 answer
  • How many faces does a rectangle have?
    13·2 answers
  • a racing pig eats 5 1/2 cups of food each day. one cup of food weighs 1 3/5 ounces . how many ounces of food does the pig eat ea
    6·2 answers
  • What is the answer of 2+2
    13·2 answers
  • Write an equation of the line below.
    8·1 answer
  • Which expressions are equivalent to the one below? Check all that apply.
    6·2 answers
  • Help!! Best answer gets brainliest
    11·1 answer
  • Please help this is due today!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!