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Serga [27]
2 years ago
7

Im giving brainliest to who ever needs it

Mathematics
2 answers:
NikAS [45]2 years ago
4 0

Answer:

heck ya

Step-by-step explanation:

alexdok [17]2 years ago
4 0
Hey, thanks for doing this.
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Which sum or difference identity would you use to verify that cos (180° - q) = -cos q?
Phantasy [73]

Answer:

\cos (a-b)=\cos a \cos b+\sin a \sin b

Step-by-step explanation:

 Given : \cos (180^{\circ}-q)=-\cos q

We have to write which identity we will use to prove the given statement.

Consider \cos (180^{\circ}-q)=-\cos q

Take left hand side of given expression \cos (180^{\circ}-q)

We know

\cos (a-b)=\cos a \cos b+\sin a \sin b

Comparing , we get, a= 180° and b = q

Substitute , we get,

\cos (180^{\circ}-q)=\cos 180^{\circ}  \cos (q)+\sin q \sin 180^{\circ}

Also, we know \sin 180^{\circ}=0 and \cos 180^{\circ}=-1

Substitute, we get,

\cos (180^{\circ}-q)=-1\cdot \cos (q)+\sin q \cdot 0

Simplify , we get,

\cos (180^{\circ}-q)=-\cos (q)

Hence, use difference identity to  prove the given result.

7 0
4 years ago
Read 2 more answers
What’s the answer to 15=2y-5
Natali [406]

15=2y-5

move -5 to the other side

sign changes from -5 to +5

15+5= 2y-5+5

15+5= 2y

20= 2y

divide both sides by 2

20/2= 2y/2

y= 10

Answer : y= 10

3 0
3 years ago
If f(x)= x+7 and g(x)=1/x , what is (f*g)(x) please help quic
Vika [28.1K]

1/x + 7

-1/x = 7

-1/x times x = 7

-1 = 7x

<h2><u><em>x = -1/7</em></u></h2>

-1 =

7 0
3 years ago
19.1 x 8.6 regrouped
Serggg [28]

Answer: 164.26, 77.08, 2405.364

Step-by-step explanation: Inhope this is what you were looking for best of luck. About the brainliest answer tho...

3 0
2 years ago
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Brianna has a sheet of paper that is 6 feet long.she cuts the length of paper into sixth and then cuts the length of each of the
maxonik [38]
72 inches. 
<span>72/6=12inch sixths </span>

<span>each sixth is cut into a third </span>

<span>12/3=4 inches </span>

<span>each of these eighteenths (6*3=18) have a length of four inches. </span>

<span>Check. 18*4 should equal 72. You have 18 pieces, each four inches long.

Got it all?</span>
8 0
3 years ago
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