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pentagon [3]
3 years ago
7

Cos2x + sin2 x =______

Mathematics
1 answer:
Alenkasestr [34]3 years ago
8 0
Cos²(x) + sin²(x)
¹/₂[1 - cos(2x)] + ¹/₂[1 + cos(2x)]
[¹/₂ - ¹/₂cos(2x)] + [¹/₂ + ¹/₂cos(2x)]
¹/₂ + ¹/₂ - ¹/₂cos(2x) + ¹/₂cos(2x)
1
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Dmitriy789 [7]

Answer:

The answer is obviously letter A!

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3 0
3 years ago
the perimeter of a rectangle parking lot is 322 m. if the length of the parking lot is 86 m, what is the width
bekas [8.4K]
Perimeter of rec. = 2 ( l + w )

Given: perimeter of rectangle = 322m, length = 86m

Required: width = ?

Solution: 322 = 2 ( 86 + w )
Divide 322 by 2 ie, 322/2 = 86 + w
Will be equal to 161 = 86 + w
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4 0
3 years ago
What is 1 + 4 my good sir
tia_tia [17]

Answer:

5

Step-by-step explanation:

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6 0
3 years ago
Read 2 more answers
Alex needs 80 cm of thread for a sewing project. The thread is on a spool with a circumference of 10 cm. How many times must ale
Mrrafil [7]

<u>Answer:</u>

If the spool has 10 cm of circumference or perimeter, this means that 10 cm of thread fits the whole circumference of the spool, which also means that

<h2>1 unwind is equivalent to 10 cm of thread. </h2>

Then, we have to make the following question:

If 10 cm of thread is equivalent to 1 unwind, to how many unwinds is equivalent 80 cm of thread?

If we want to know how many time does Alex need to unwind the spool, we can use the following relation also called the <u>Rule of Three: </u>

<u> </u>

10 cm----1 unwind

80 cm----X unwinds

X=\frac{80cm(1unwind)}{10cm}

X=8unwinds

The answer is:

Alex must unwind the spool 8 times in order to get 80 cm of thread


5 0
3 years ago
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