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Ratling [72]
2 years ago
11

(cos2a *cos 4a+ sin 2a*sin 4a)/sin4a

Mathematics
1 answer:
lyudmila [28]2 years ago
4 0

Answer:

Step-by-step explanation:

(cos 4a*cos 2a+sin 4a*sin 2a)/sin 4a

=[cos (4a-2a)]/sin 4a

=(cos 2a)/sin 4a

=(cos 2a) /(2 sin 2a cos 2a)

=1/(2 sin 2a)

=1/2 csc 2a

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Find the area and show work if you can.
baherus [9]

Answer:

The area of figure is 420 000 ft².

Step-by-step explanation:

You can seperate the diagram into 2 parts, top is trapezium and bottom is rectangle. Then you have to use the formula for each part :

Trapezium,

A =  \frac{1}{2}  \times (a + b) \times height

Let a = 600 ft,

Let b = 900 ft,

Let height = 200 ft,

A =  \frac{1}{2}  \times (600 + 900) \times 200

A = 150 \: 000 \:  \:  \:  {feets}^{2}

Rectangle,

A = base \times height

Let base = 900 ft,

Let height = 300 ft,

A = 900 \times 300

A = 270 \: 000 \:  \:  \:  {feets}^{2}

Lastly, you have add both areas together :

A = 150000 + 270000

A = 420 \: 000 \:  \:  \:  {feets}^{2}

8 0
3 years ago
Read 2 more answers
Please someone help :) thanks ; )
sammy [17]
X/4 = 21
x = 21 · 4
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6 0
3 years ago
Read 2 more answers
How do the values compare? Order the values from least to greatest
malfutka [58]
-2 1/4, -1 1/4, 3/4, |-1 1/4|, |-1 3/4|, |-2 1/4
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8 0
3 years ago
In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users must be su
prisoha [69]

Answer:

1568

Step-by-step explanation:

The computation of the minimum sample size is shown below:

Given that

Error E = 11

The population standard deviation \sigma =217

Confidence level 1-α = 95%

Now following formula should be used

n > (Zalpha ÷ 2 × sigma ÷ E)^2

As we know that

Zalpha ÷ 2= 1.96

Now the sample size is

n> (1.96 × 202  ÷ 10)^2

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6 0
2 years ago
Mark bought 2 pounds of walnuts for 25.50 Approximately how much will he pay for 7 pounds of walnuts​
lara31 [8.8K]

Answer:

89.25

Step-by-step explanation:

2pound of walnut= 25.50

1 pound of walnut= 12.75

7punds of walnut= 89.25

7pounds of walnut= 12.75* 7=89.25

3 0
3 years ago
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