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Temka [501]
2 years ago
14

How would you go about solving this? This is the half angle and double angle identities unit if that helps

Mathematics
1 answer:
erastovalidia [21]2 years ago
5 0

Yes you are right. This does involve more trig that physics. So let's review the math for a bit.


Cos(2x) = cos^2(x) - sin^2(x) Substitute 1 - sin^2(x) for cos^2(x)

Cos(2x) = 1 - sin^2(x) - sin^2(x)

cos(2x) = 1 - 2*sin^2(x) Now we need to solve for sin^2(x)

2sin^2(x) = 1 - cos(2x)

sin^2(x) = (1 - cos(2x))/2


Now all we need do is make a few substitutions.

x = ωt

Substitute (1 - cos(2ωt))/2 for sin^2(ωt)


P = (Io)^2 *R * (1 - cos(2ωt))/2


P = (Io)^2*R/2 - (Io)^2*R cos(2ωt) / 2


I think if you follow it carefully, you will find that the answer is

B <<<<< Answer.

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D. 11

Step-by-step explanation:

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2 years ago
A store pays $60 for shoes and sells them for $90. What is the percent mark up?
Anton [14]

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50%

Step-by-step explanation:

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2 years ago
A car travels 45km in an hour. In each of the next two hours, it travels 78km. What is the average speed of the car.
romanna [79]

Answer:

The average speed of car is 67 kilometers per hour.

Step-by-step explanation:

Given that:

Distance travelled in one hour = 45 km

Distance travelled in next 2 hours = 78*2 = 156 km

Total distance = 45+156 = 201

Total time = 1+2 =  3 hours

Average speed of the car = \frac{Total\ distance}{Total\ time}

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7 0
2 years ago
use the line graph to answer the question 9 and 10 how much did the temperature change from Sunday High to Mondays High ? what w
Marizza181 [45]

Answers:

<em>How much did the temperature change from Sunday High to Mondays High?</em>

Change = 4 °C

<em>What was the difference between the high temperatures on Friday and Wednesday?​</em>

Difference = 10 °C

Explanation:

Taking into account the graph, we get that the high temperature each day is:

Sunday: -10°C

Monday: -6 °C

Tuesday: - 4 °C

Wednesday: -6 °C

Thursday: 0 °C

Friday: 4 °C

Saturday: -2 °C

So, the change from Sunday High to Mondays High can be calculated as:

Change = Monday - Sunday

Change = -6 °C - (- 10 °C)

Change = -6 °C + 10 °C

Change = 4 °C

In the same way, the difference between the high temperatures on Friday and Wednesday can be calculated as:

Difference = Friday - Wednesday

Difference = 4 °C - (-6 °C)

Difference = 4 °C + 6 °C

Difference = 10 °C

Therefore, the answers are:

<em>How much did the temperature change from Sunday High to Mondays High?</em>

Change = 4 °C

<em>What was the difference between the high temperatures on Friday and Wednesday?​</em>

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6 0
1 year ago
How many numbers of possible live card hands (hands in five-card poker) drawn without replacement from a standard deck of 52 pla
makkiz [27]

The combination shows that the numbers of possible live card hands drawn without replacement from a standard deck of 52 playing cards is 2,598,960.

<h3>How to explain the information?</h3>

A permutation is the act of arranging the objects or numbers in order while combinations are the way of selecting the objects from a group of objects or collection such that the order of the objects does not matter.

Since the order does not matter, it means that each hand is a combination of five cards from a total of 52.

We use the formula for combinations and see that there are a total number of C( 52, 5 ) = 2,598,960 possible hands.

Learn more about permutations and combination on:

brainly.com/question/4658834

#SPJ1

3 0
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