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
Andreyy89
2 years ago
13

Please help me with this trigonometry question. Brainliest available.

Mathematics
1 answer:
faltersainse [42]2 years ago
5 0
Considering the angle a by cosine rule
11^2 =7 ^2 +15^2 - 2(7)(15)cos(a)
When you do the maths,
Cos(a) =153/210 =0.729
a= cos inverse of 0.729
a=43 degrees


Considering angle b
7^2=15^2 +11^2 -2(11)(15) cos(b)
This will result in cos(b) =297/330=0.9
b= cos inverse of 0.9 = 25.8 degrees


Considering angle c
15^2=7^2 +11^2 - 2(11)(7) cos(c)
Cos(c) will be = -55/154 = -0.357
c= cos inverse of -0.357=110.9

Comparing the angles a,b and c,
C is the largest size in the triangle with an angle of 110.9 degrees

Am I right please ??
You might be interested in
1.Find the zeros of f(x) = x2 - 9
Marat540 [252]
So for the first one it is (x-3)(x+3) this is because it is a difference of squares so you square root the 9 and the minus you do both +and - in order to keep up the -9
The zeros are:x=3 and x=-3 ( this is because you change the sign in the bracket


the others should be pretty simple to do for number 2 its a complex
the third is a simple trinomial
and fourth is simple trinomial as well
6 0
3 years ago
at tennis practice, tim practices his backhand and his serve at least 2 hours each day. He works less on his backhand than his s
earnstyle [38]
For the answer to the question above, Tim practices his backhand and his serve at least 2 hours each day this means X =< 2 ( less than or equal to 2 hrs). He works less on his backhand than his serve and practices his serve more than an hour daily.  <span>Y < 1</span>
3 0
3 years ago
Consider the graph of the linear equation 2x - 5y = 10.
jeyben [28]

Answer:

x-intercept= (5,0)

y-intercept= (0,-2)

Slope= 2/5

Step-by-step explanation:

7 0
3 years ago
Charles has $20 to spend at the bakery he wants to buy six cupcakes and a pie. The pie costs
Oduvanchick [21]
The most he can buy for each cupcake is 1.25
8 0
3 years ago
42 /48 in simplest form
zloy xaker [14]

<span>First we need to find the GCF (greatest common factor)</span>

<span>Factors of 42 are:
1, 2, 3, 6, 7, 14, 21, 42</span>

<span>Factors of 48 are:
1, 2, 3, 4, 6, 8, 12, 16, 24, 48</span>

<span>GCF is 6</span>

<span>To simplify you divide numerator and denominator into the GCF</span>

<span>42 ÷ 6 = 7</span>

<span>48 ÷ 6 = 8</span>

<span>42/48 = 7/8</span>

<span>Hope this helps. :)
</span>

6 0
3 years ago
Other questions:
  • Name a chord for the circle.​
    7·1 answer
  • 5/8 + 3/5 greater than 1 or less than 1​
    6·1 answer
  • Amber has 3/4 Ib. of strawberry icing. She needs 1/8 of a Ib. of strawberry icing for each cake she makes. How many cakes can sh
    11·1 answer
  • How many thousands are in 5,000 ones
    6·2 answers
  • A population of deer in an area is 2000 and is decreasing at a rate of 15% per year. At this rate what will the deer population
    7·1 answer
  • Need help to solve. ​
    14·1 answer
  • PLZ HELP PLZ (1a) Use long division to show the fraction and decimal in each pair are equivalent? 3/4 &amp; 0.75. Hint: Divide 3
    6·1 answer
  • 1. Solve MMXXVII -MCMXCII<br>A.LV<br>B. XLV<br>C. XXXV<br>D. XXV<br>E. XV​
    13·1 answer
  • Can someone help me with these 2 answers
    10·2 answers
  • A package of twelve eggs cost $5 at this price, how much does each individual egg cost?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!