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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

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How many solutions does the equation have? |h| − 8 = 4<br> no solution, one solution, two solutions
Gennadij [26K]

Since the solution to the system of equation is 12 and -12, hence the equation has 2 solutions

<h3>Modulus functions</h3>

Modulus functions are functions that can either be positive or negative. Given the modulus function below;

|h| − 8 = 4

The modulus of h can both be negative and positive

If the modulus of h is positive then;

h - 8 = 4

Add 8 to both sides

h-8 + 8 = 4 + 8

h = 4 + 8

h = 12

If the value of h is negative

-h - 8 = 4

-h = 4 + 8

h =-12

Since the solution to the system of equation is 12 and -12, hence the equation has 2 solutions

Learn more on modulus function here: brainly.com/question/23450491

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5 0
1 year ago
Replace m with a whole number. <br> 7 (4+m)=49
Ann [662]
7*4=28
28+7m=49
49-28=21
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m=3
3 0
3 years ago
Which choice is equivalent to the product below when x is greater than or equal to 0
QveST [7]

Answer: I believe it is C.

Step-by-step explanation: Because if you take 4 x 20 = 80

If  I am wrong sorry.

7 0
3 years ago
4y+2y+10=50 <br>show your work<br>​
denis23 [38]

Answer:

y = 20/3

Step-by-step explanation:

4y + 2y + 10 = 50

Combine like terms on the left side.

6y + 10 = 50

Subtract 10 from both sides.

6y = 40

Divide both sides by 6.

y = 40/6

Reduce the fraction by dividing the numerator and denominator by 2.

y = 20/3

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