1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Akimi4 [234]
3 years ago
10

If tan²A = 1+ 2tan²BShow: COS2B = 1+2 cos2A​

Mathematics
1 answer:
OLga [1]3 years ago
4 0

Answer:

Step-by-step explanation:

hello :

here is this idea :  

tanA= sinA/cosA          tanB= sinB/cosB

cos²A+sin²A =1              cos²B+sin²B =1  

cos²A-sin²A=cos2A            cos²B-sin²B=cos2B

You might be interested in
How many more stickers are on maddies notebook than on megs notebook
Tems11 [23]
10, because then meg would have 5. 
5 0
3 years ago
Read 2 more answers
Help me out plz bcbxbxbxhx
Ludmilka [50]

Multiply by 5 is correct
5 0
3 years ago
Read 2 more answers
for your career project, you plan to design ans sell t-shirts. During the first 5 weeks of selling the shirts, the functions f(s
stepladder [879]

Using translation concepts, we have that:

  • The new profit equation is f(x) = (8s/3) - 20, which is a vertical stretch by a factor of 2 of the graph of f(s).
  • Selling 300 shirts, the new profit is of $780.

<h3>What is a translation?</h3>

A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction either in it’s definition or in it’s domain. Examples are shift left/right or bottom/up, vertical or horizontal stretching or compression, and reflections over the x-axis or the y-axis.

For this problem, the profit function is given by:

f(s) = 4/3s - 20

To double the function, we multiply the slope by 2, hence the new profit equation is:

f(s) = 8/3s - 20.

This new function is a vertical stretch by a factor of 2 of the graph of f(s).

The new profit selling 300 shirts is given by:

f(300) = (8/3) x 300 - 20 = 8 x 100 - 20 = $780.

More can be learned about translation concepts at brainly.com/question/28373831

#SPJ1

4 0
2 years ago
Use the diagram below to answer the question.
Lunna [17]

Answer:

The length of shadow is 69 foot.

Step-by-step explanation:

We are given a shadow of lighthouse.

Length of top of lighthouse to end of shadow is 90 ft.

Angle make at top of lighthouse is 50°

Distance from foot of lighthouse to end of shadow is x ft.

we need to find the length of shadow i,e x ft

Using trigonometry ration:

\sin\theta=\dfrac{P}{H}

\sin50^\circ=\dfrac{x}{90}

x=90\times 0.766

x=68.94\approx 69\text{ ft}

Hence, The length of shadow is 69 foot.

7 0
3 years ago
Which statement explains why 49 is a perfect square?
Sav [38]
It’s 49 is equal to 7 times 7
5 0
4 years ago
Read 2 more answers
Other questions:
  • For a Cinco de Mayo party, Alan is placing sets of chips and salsa's throughput the house. He has 20 bags of chips and 15 jars o
    11·2 answers
  • Please help i will mark brainly
    5·2 answers
  • 6 loads of stone weigh 2/3 ton. Find the weight of 1 load of stone.
    13·1 answer
  • In your notebook, set up the following addition using a vertical format and find the sum of the given polynomials.
    9·2 answers
  • HELP MEE PLEASE! PLEASE DONT MESS AROUND!​
    5·1 answer
  • Please help is it A, B, C, or D?????
    7·1 answer
  • Solve for the value of x ? −2(x+13)+9x=4
    12·2 answers
  • PLEASE HELP .!!! ILL GIVE BRAINLIEST.. *EXRTA POINTS* .. DONT SKIP :(( ! <br> ILL GIVE 40 POINTS .
    8·1 answer
  • What is the volume of the composite
    9·1 answer
  • Calculate the area of this triangle.<br><img src="https://tex.z-dn.net/?f=%20" id="TexFormula1" title=" " alt=" " align="absmidd
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!