All categories

3 years ago

Law of cosines: a2 = b2 + c2 -2bccos(A) What is the value of s to the nearest whole number?

Mathematics

2 answers:

xxTIMURxx [149]3 years ago

8 0

Answer:

Step-by-step explanation:

The law of cosines is a² = b²+c²-2bc(cos A).

We will use s in place of a, since it is the unknown side. This makes b and c 8 and 9.

Angle A will be the angle opposite side a, or in this case side s. This makes it 111.

This gives us

s² = 8²+9²-2(8)(9)(cos 111)

s² = 64+81-2(8)(9)(cos 111)

s² = 145-144(cos 111)

s² = 196.605

Take the square root of each side:

√(s²) = √(196.605)

s = 14.02 ≈ 14

tatiyna3 years ago

6 0

Answer:

Step-by-step explanation:

You might be interested in

Identify the a b and c values of the following quadratic expression 4x^2+5x=4

yarga [219]

A is the 4

B is the 5

and C is also 4.

A is always the number in front of x^2. B is always the number i front of the normal x, and C is the number that is on the other side of the equal sign!

6 0

2 years ago

What is 8 and 21/40 in decimal form? If don't uderstamd what is 8 and 21 over 40 in decimal form? Plz help thx✌️

Marrrta [24]

It is 8.525. what u do is 21÷40 and get .525 and then u add the 8 in the front and get 8.525

4 0

3 years ago

PLEASE PLEASE PLEASE HELP

aksik [14]

Answer: X- 0,1,2,3,4 and Y-0,6,12,18,24

Step-by-step explanation: i had to take this test ): luck

5 0

3 years ago

А E с D В If mZACD = 100°, then mZECB = [?]°

11111nata11111 [884]

Answer:

100

Step-by-step explanation:

they are vertical angles therefore, they have the same measure.

4 0

3 years ago

What is the slope of the line below? If necessary, enter your answer as a

alisha [4.7K]

Step-by-step explanation:

Use formula to find the slope/gradient

$\frac{y2 - y1}{x2 - x1}$

(-5, -1) = (x1, y1)

(5, 11) = (x2, y2)

So,

$= \frac{11 - ( - 1)}{5 - ( - 5)} \\ = \frac{12}{10 } \\ = \frac{6}{5}$

8 0

2 years ago