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
nata0808 [166]
3 years ago
11

Find m∠C m . A. 34 B. 57 C. 52 D. 64

Mathematics
1 answer:
lara [203]3 years ago
3 0

Answer:

  B.  57

Step-by-step explanation:

You can solve the triangle using the Law of Cosines, then find the required angle using the Law of Sines. Or, you can estimate it based on the fact that the angle shown is very nearly 90°.

If ∠B were 90°, then the value of ∠C would be ...

  ∠C ≈ arctan(21/14) ≈ arctan(1.5) ≈ 56.3°

Since ∠B is slightly smaller, ∠C will be slightly larger. The nearest value slightly larger than 56.3° is choice B, 57°.

_____

Doing this the long way, you get ...

  b² = a² + c² - 2ac·cos(B) = 14² +21² -2(14)(21)cos(89°) ≈ 626.738

  b ≈ √626.738 ≈ 25.035

Then angle C is given by the law of sines as ...

  sin(C)/c = sin(B)/b

  C = arcsin(c/b·sin(B)) ≈ arcsin(0.838707) ≈ 57.004°

  m∠C ≈ 57°

_____

Many graphing calculators can solve triangles, as can phone or tablet apps.

You might be interested in
christen has to run around the rectangle soccer field during practice. The soccer field measures 60 meters long by 45 meters wid
Elena L [17]

Answer:

210 m

Step-by-step explanation:

Perimeter is the distance around the outside of a two-dimensional shape.

Area is the space inside of a two-dimensional shape. We can also think of area as the amount of space a shape covers.

Christen ran around the soccer field, so she ran around the perimeter.

We can find the perimeter by adding all of the side lengths.

Perimeter=60 m+45 m+60 m+45 m

Christen ran 210m.

7 0
3 years ago
How do you find the vertical asymptote of a rational expression?
ElenaW [278]
Here is the answer to the question. Vertical asymptotes a<span>re vertical lines which correspond to the zeroes of the denominator of a </span>rational function. Therefore, in order to find the vertical asymptote of a rational expression, what you are going to do is to <span>set the denominator equal to 0 and solve for x. Hope this helps.</span>
5 0
3 years ago
The area of the rectangle below is ___sq. units.
iren2701 [21]

Answer: Let's have the picture of the rectangle

Step-by-step explanation:

4 0
3 years ago
Queen spend 3/5 hrs studying and spend 4 /10 hrs at the computer. How much less time does queen spend at the computer compared t
Ksju [112]

Answer:

Queen spends 1 1/1 less time at studying.

4 0
3 years ago
Please help with this question.
ziro4ka [17]

Answer:suchi i think is on the cite

Step-by-step explanation: suchi you need rice at first

4 0
3 years ago
Other questions:
  • Describe AND correct the error below.<br> 17 + (-31) = -48
    7·2 answers
  • For ten weeks, you recorded the growth of five rabbits. Each rabbit was given unlimited freshwater, but was fed a different type
    8·1 answer
  • T(z)=z-8 <br> Evaluate t(-2)
    6·1 answer
  • What is the value of x in the equation 2^12 = 2^15x?
    5·1 answer
  • 3x+y-2z=22 x+5y+z=4 x=-3z
    6·1 answer
  • Write 8 as a percentage of 32<br> Plssss helppp
    11·2 answers
  • Giving brainliest!!!! For correct answer give me a explanation not a long explanation tho.
    5·2 answers
  • if a real estate agent sold a house for $120,800 and earns a 3% commission determine how much money the agent earned?​
    7·1 answer
  • A farm has 5 brown cows and 10 white cows. A fence is open and a cow escapes. What is the probability that it will be a brown co
    13·2 answers
  • A watch loses 2 minutes in 10 hours at this rate how many minutes will it lose in 24 hours
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!