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Ipatiy [6.2K]
3 years ago
6

Find an exact value. cosine of nineteen pi divided by twelve.

Mathematics
2 answers:
zaharov [31]3 years ago
4 0
The answer is -0.083333333333333
mihalych1998 [28]3 years ago
4 0

Answer:

-0.0833

Step-by-step explanation:

\frac{cos^19(\pi)}{12}=-\frac{1}{12} = -0.0833

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Find the values of x and y
qaws [65]

Answer:

y=30

x=60

Step-by-step explanation:

The triangle has all sides equal therefore all the angles are equal.

For all the angles to be equal and add up to 180 (sum of angles in a triangle is 180), each angle has to be 60.

Therefore y=90-60

=30

x=180-(30+90)

=60

8 0
2 years ago
Y=x+2<br> 3x+3y=6<br> solving systems by substitution
motikmotik

Answer:6

Step-by-step explanation:Reorder

2

2

and

−

x

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.

y

=

−

x

+

2

y

=

-

x

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2

3

x

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3

y

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Replace all occurrences of

y

y

in

3

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with

−

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y

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-

x

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2

3

x

+

3

(

−

x

+

2

)

=

6

3

x

+

3

(

-

x

+

2

)

=

6

Simplify

3

x

+

3

(

−

x

+

2

)

3

x

+

3

(

-

x

+

2

)

.

Tap for more steps...

y

=

−

x

+

2

y

=

-

x

+

2

6

=

6

6

=

6

Since

6

=

6

6

=

6

, the equation will always be true.

y

=

−

x

+

2

y

=

-

x

+

2

Always true

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6 0
3 years ago
Can someone help me with this?
Westkost [7]

Answer:

A=10 cm

B=5 cm

Area of square = 25 cm

Step-by-step explanation:

Since that is an equilateral triangle based off the fact that all the sides are the same variable (a) then that means 30 divided by 3 which equals 10. So now we know that a = 10. Lets input that information for the rectangle. Since there are 2 a's that equals 20 and the perimeter is 30 so b has to be 5 since 5 times 2 is 10 plus 20 equals 30. so now we know that a=10 and b=5 so our squares sides are all 5. The area of the square is 25

7 0
3 years ago
Given RS = 6, ST = 3, and SL = 4, find SM.
NemiM [27]
A² + b² = c²
3² + 4² = c²
9 + 16 = c²
C² = 25
C = 5
so
SM = 5
7 0
3 years ago
Read 2 more answers
(Please help!) What is the value of x?
lina2011 [118]

Answer:

x = 5.1

Step-by-step explanation.

Our first step is to find all the angles. If b = 91 degree and c is 38, a. has to be 51 because all triangles add up to 180 degree. Because we have both B and b, we can use sine law.

a/A     13/sin91      c/38

we can use b in this situation.

The legnth  of a is 10.1.

So,  x-5 would be 5.1

6 0
3 years ago
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