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
Mademuasel [1]
3 years ago
9

Find the value of 2abcosC.

Mathematics
2 answers:
Strike441 [17]3 years ago
6 0

Answer:

7

Step-by-step explanation:

a=2

b=2

c=1

2ab cos C=a²+b²-c²=2²+2²-1²=4+4-1=7

Mazyrski [523]3 years ago
4 0

Answer:

C

Step-by-step explanation:

Given

a² + b² - 2abcosC = c² ( subtract c² from both sides )

a² + b² - c² - 2abcosC = 0 ( add 2abcosC to both sides )

a² + b² - c² = 2abcosC

Here a = 2, b = 2, c = 1 , then

2² + 2² - 1² = 2abcosC

4 + 4 - 1 = 2abcosC , then

2abcosC = 7 → C

You might be interested in
Casey is making a balloon arrangement of latex balloons and mylar balloons. Each latex balloon costs $0.25 and each mylar balloo
Elodia [21]
15 latex balloons and 4 Mylar balloons
7 0
3 years ago
HELP QUICK PLEASE! THANKS
Helen [10]
Seven more than a number
7 0
3 years ago
Please answer ASAP!!!! My battery is about to DIEEEE! Save me from the clutches of mathematics.
Anna11 [10]

Answer:

C

Step-by-step explanation:

First, get the radius, 2.2*3.14 is 6.908. Then, multiply by 18, 6.908*18 is 124.344.

5 0
3 years ago
What is the slope of the line passing through (-3, 5) and (5,-3)?
Delvig [45]
-1 is the answer to your question
8 0
3 years ago
Read 2 more answers
What is the meaning of babalawo​
vaieri [72.5K]

Answer:

how are we supposed to know that

7 0
3 years ago
Read 2 more answers
Other questions:
  • Homer wants to identify the center and radius of the circle defined by the equation x2 + y2 - 14x +
    9·1 answer
  • One of the greatest assets of a secretary is often his/her ability on the keyboard of a computer. Mrs. Garcia has been recognize
    9·1 answer
  • Square 1 has a side length of x, and square 2 has a side length of y. Square 2 is formed by joining the midpoints of the sides o
    11·2 answers
  • Does anyone know what 2/6 plus 1/8 is?
    8·1 answer
  • Help me QUICK, plz! 15 points!
    6·1 answer
  • What is the ratio of twenty-four cans on sale at two for nine dollars?
    8·2 answers
  • the sum of the squares of the length of all three sides of a right triangle is 200. what is the length of the hypotenuse
    5·2 answers
  • At the grand opening, every 8th customer received a free coffee mug, and every 12th customer received a free baseball cap. How m
    15·1 answer
  • How do you graph y=7x-1
    6·1 answer
  • Find the 38th term of the sequence. 359, 352, 345
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!