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
Eighty students are going on a field trip to a history museum. The total cost includes 2 bus rentals and $10 per student for lun
Oliga [24]
$24 for each student to go on the bus + $10 for lunch . $34 for each student .
4 0
4 years ago
Find an equation of the tangent to the curve at the point corresponding to the given value of the parameter. x = cos(θ) + sin(10
vivado [14]

Answer:

Step-by-step explanation:

x = cos θ + sin(10θ)

y = sin θ + cos(10θ)

Take derivative with respect to θ:

dx/dθ = -sin θ + 10 cos(10θ)

dy/dθ = cos θ - 10 sin(10θ)

Divide:

dy/dx = (dy/dθ) / (dx/dθ)

dy/dx = (cos θ - 10 sin(10θ)) / (-sin θ + 10 cos(10θ))

Evaluate the derivative at θ=0:

dy/dx = (cos 0 - 10 sin 0) / (-sin 0 + 10 cos 0)

dy/dx = 1/10

Evaluate the parametric functions at θ=0:

x = cos 0 + sin 0 = 1

y = sin 0 + cos 0 = 1

Writing the equation of the tangent line in point-slope form:

y - 1 = 1/10 (x - 1)

6 0
3 years ago
Hailey went to the market and bought 5 pounds of coffee that costs $2 a pound. She also purchased 2/3 pounds of lunch meat that
Firdavs [7]

Answer:

$16

Step-by-step explanation:

$2 x 5 = $10

1 pound = $9

2/3 = $6

10+6=16

6 0
3 years ago
Given mn, find the value of x.<br> 108
adoni [48]

Answer:

72 degrees

Step-by-step explanation:

Referencing off of line t being a straight line, a straight line is 180 degrees. If you subtract 108 from 180, you would get 72. Since this intersecting line is going through 2 paralel lines, the 2 groupings of angles reflect each other.

3 0
3 years ago
Write the following equation in slope-intercept form: 3x+4y=12
Sergeeva-Olga [200]
Hello, MissMisty here to help you. 

<span>• </span>The answer • 
Y = -3/4 + 3

Thanks! I hope it helped you, I'm glad I could help if it did. Have a good morning.
8 0
3 years ago
Other questions:
  • What is the mean of the prices below?
    15·2 answers
  • When you dry mushrooms, they lose 72% of their weight. What weight of fresh mushrooms do you need in order to get 12.25 lb of dr
    14·2 answers
  • How many 1/4can go in 1/8
    13·2 answers
  • what is the slope of the line below? If necessary, enter your answer as a fraction in lowest terms, using the slash as the fract
    6·2 answers
  • What is the area of the triangle in this coordinate plane?
    14·2 answers
  • Find the value of x so that f(x)=3
    12·1 answer
  • (6.5 x 4) x 2.25 + 4 - 2
    6·2 answers
  • A triangle has sides with lengths of 2 centimeters, 4 centimeters, and 5 centimeters. Is it a right triangle?
    11·2 answers
  • Can someone figure out how to do this I don't know how.
    8·1 answer
  • A model of a sailing boat is made to the scale
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!