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Svetradugi [14.3K]
2 years ago
12

Which expression is equivalent to sin

Mathematics
1 answer:
Scilla [17]2 years ago
4 0

Answer:

sin(-pi/2) = -1

Step-by-step explanation:

sin (pi/12) cos((7pi)/12) -cos (pi/12) sin((7pi)/12) = -1

cos(-pi/2) = 0

sin(-pi/2) = -1

cos((2pi)/3) = -1/2

sin((2pi)/3) = (√3)/2

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elena-14-01-66 [18.8K]
The answer is 4,700 square feet
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zysi [14]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
Sue has 100 dimes and quarters. If the total value of the coins is $21.40, how many of each kind of coins does she have?
Nookie1986 [14]

Answer:

There would be 24 dimes and 76 quarters.

Step-by-step explanation:

In order to find this, start by defining the number of dimes by x and the number of quarters as y. Now we can create a system of equations. Make the first about the total number of coins.

x + y = 100

Make the second about the amount of money.

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Now we can solve using elimination by multiplying the second equation by -4 and adding through.

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-----------------------

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Now we can use the amount of dimes we have to find the number of quarters.

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3 0
3 years ago
I really need help with this pls help and show work​
ohaa [14]

okay so first we need to multiply 160 on both sides

{18/32(160)=n/160*160 (160 cancels out)}

so once we finish our calculations on the left side we get n equals 90

{n=90}

6 0
3 years ago
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ruslelena [56]

Answer:

Step-by-step explanation:

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3 years ago
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