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Len [333]
3 years ago
12

How do you prove #sin 5pi/12 = sin pi/6 cos pi/4 + cos pi/6 sin pi/4#?

Mathematics
1 answer:
choli [55]3 years ago
6 0
You rewrite 5π/12 as  2π/12 + 3π/12 since 2 + 3 = 5.
Then you simplify the fractions into π/6 + π/4.
Then you use the sine addition identity.

sin(5π/12) = sin(π/6 + π/4) = sin <span>π/6 cos </span><span>π/4 + cos </span><span>π/6 sin </span><span>π/4</span>
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Answer:

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Step-by-step explanation:

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3 years ago
21.39 + 9=x ok this seems easy but I'm stuck it is supposed to= 30.39 how do you get that answer
Elodia [21]

Answer:

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Step-by-step explanation:

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3 0
2 years ago
Read 2 more answers
Find last year’s salary if, after a 3% pay raise, this year’s salary is $30,900
Liono4ka [1.6K]
Your answer is $30,000.
The way I have answered this is quite strange, but I'll do my best to explain it. So because we know that $30,900 is 3% than last year, we can call it 103%. This allows us to form a ratio and therefore find 100%.
30,900 : 103
÷ 103
300 : 1
× 100
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5 0
3 years ago
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How to solve this task 4×-2+1=3×+5
just olya [345]
4x-2+1=3x+5

Subtract 3x from both sides

x-2+1=5

Same as

x-1=5

Add 1 to both sides

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8 0
3 years ago
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kari74 [83]

Answer:

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