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nexus9112 [7]
2 years ago
6

I need help with thsi pls help

Mathematics
1 answer:
Tresset [83]2 years ago
3 0

First one is ur answer.

I HOPE IT HELPS U.

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Find the exact value of tan 15 degrees
pentagon [3]
<span>tan(15) = 
sin(15) / cos(15) = 
sin(45 - 30) / cos(45 - 30) = 
[ sin(45)cos(30) - sin(30)cos(45) ] / [ cos(45)cos(30) + sin(45)sin(30)] 

Since sin(45) = cos(45) = √2/2, you can just factor that out from the top and bottom 
[ cos(30) - sin(30) ] / [ cos(30) + sin(30)] 
[ √3/2 - 1/2 ] / [ √3/2 + 1/2] 
(√3 - 1) / (√3 + 1) 
(√3 - 1)^2 / (√3+1)(√3 - 1) 
(√3 - 1)^2 / (3 - 1) 
(3 - 2√3 +1) / 2 
2 - √3 

There's also a formula for tan(a-b), but I couldn't remember it off hand.</span>
4 0
3 years ago
Show how to solve this two step problem. My item is 40% off. The original price is X. Explain the two one step equations you wou
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40% of (times) X
4/10 of (times) X or 2/5 or .4
145 (times) .4 which is 58
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3 years ago
Kathleen deposits $20 into her account that earns 2.5% interest that is compounded twice a year. How much money will Kathleen ha
Arada [10]
A=20×(1+0.025÷2)^(2×30)
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8 0
3 years ago
What's the answer to this math problem?
m_a_m_a [10]

Answer:

take the numbers and do the equation steps then fill the box in

Step-by-step explanation:

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A waiter earns $128 for 6 hours
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Answer:

$21.33

Step-by-step explanation:

If the waiter earns $128 for 6 hours, divide 128 by 6.

21.33...

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2 years ago
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