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Luden [163]
3 years ago
15

What is the expanded equivalent of cos(a – b)?

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
4 0

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

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Solve the system of equations by substitution.<br> y = 5x - 13<br> 4x + 3y = 18<br> The solution is
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Answer:

x=3 and y=2

Step-by-step explanation:

1.) 4x+3(5x-13)=18

expand into 4x+15x-39=18

18+39= 57

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57/19= 3 so x=3

substitute 3 into y= 5x - 13

and you get 2 so y=2

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Answer:
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2 years ago
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3(4h-5) =45

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3 years ago
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Just add all the numbers together and then multiple it by 3
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