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3 years ago

10

Do you guys know this?

1 answer:

tiny-mole [99]3 years ago

7 0

Answer: b and d im sure

Step-by-step explanation:

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The law of Cosines Is......

iogann1982 [59]

Answer: $\Large\boxed{C.~21}$

Step-by-step explanation:

<u>The goal of the question</u>

Find the value of 2abcosC

<u>Given information</u>

a = 4

b = 3

c = 2

<u>Given formula (Law of Cosine)</u>

$c^2=a^2+b^2-2abcosC$

<u>Substitute values into the formula (Leave 2abcosC as it is)</u>

$(2)^2=(4)^2+(3)^2-2abcosC$

<u>Simplify the exponents</u>

$4=16+9-2abcosC$

<u>Simplify by addition</u>

$4=25-2abcosC$

<u>Add 2abcosC on both sides</u>

$4+2abcosC=25-2abcosC+2abcosC$

$4+2abcosC=25$

<u>Subtract 4 on both sides</u>

$4 + 2abcosC-4=25-4$

$\Large\boxed{2abcosC=21}$

Hope this helps!! :)

Please let me know if you have any questions

5 0

2 years ago

Read 2 more answers

A straight line has equation 3y-3x=4. Write down the equation of another straight line parallel to it

Sophie [7]

Y = 3x + 4/3
............

8 0

4 years ago

1. Use the quadratic, x? + 18x = 25 to answer the following questions.

makvit [3.9K]

Answer:

FIRST PROBLEM:

Exact Form:

x = 25 /19

Decimal Form:

x = 1.31578947

Mixed Number Form:

x = 1 6 /19

SECOND PROBLEM

Exact Form:

x = − 9 + √ 106 , − 9 − √ 106

Decimal Form: x = 1.29563014 , − 19.29563014

Step-by-step explanation:

5 0

3 years ago

ILL GIVE BRAINLEST AND EXTRA POINTS

stiv31 [10]

Sin 35 = x/15
x = sin 35*15
x = 8.6 cm

3 0

3 years ago

Pls help!!! Will mark brainliest!! links will be reported.

Ad libitum [116K]

I hope this is the right answer and if it's not then my apologies.

And sorry it took so long.

3 0

3 years ago