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Leno4ka [110]
3 years ago
9

CosA.cosecA=cotA can you please help me with this

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
3 0

CscA = 1/sinA

CosACscA = cosA × 1/sinA = cosA/SinA = cotA

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60 people plan to attend the dance and each
lina2011 [118]

Answer:

10 pizzas should be ordered

Step-by-step explanation:

60*2=120

120/12=10

6 0
3 years ago
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The 4th term of an arithmetic sequence is 24 and the 12th term is 56, what is the first term?​
spin [16.1K]
First term = 12
Solution:
A4 = 24
A12 = 56
An = A1 + (n-1)d; this defines the formula of an arithmetic series
A4 = 24 = A1 + (4-1)d
A4 = 24 = A1 + 3d
A12 = 56 = A1 + (12-1)d
A12 = 56 = A1 + 11d
Subtract A4 from A12 to get d (distance)
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32 = 8d
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4 0
2 years ago
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Which of the following is an element
zaharov [31]

We can easily enumerate E and F:


E = \{ 1,4,9 \}


F = \{ 2,4,6,8 \}


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The intersection of this set with D works in the same way, but it's actually a trivial one, since E \cap F is a subset of D. In fact, D is the set of all integers, while 4 is a particular integer. And in general, if A is a subset of B, then the intersection between A and B is A itself, so the final answer is


D \cap (E \cap F) = \{4\}

5 0
3 years ago
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snow_lady [41]

Answer:

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Step-by-step explanation:

5 0
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hoa [83]

Answer:

x = 16

DISREGARD 16.5 MY BAD the answer is 16

Step-by-step explanation:

140 = 8x+12

Subtract 12 on both sides

128 = 8x

Divide by 8

16 = x

x = 16

5 0
3 years ago
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