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umka2103 [35]
3 years ago
8

1+tan²A/1+cot²A find its value​

Mathematics
1 answer:
butalik [34]3 years ago
3 0

Answer:

tan²A  

Step-by-step explanation:

1+tan²A/1+cot²A      Simplify 1+tan²A first

sec²A/1+cot²A         Now simplify 1+cot²A

sec²A/csc²A            Simplify sec²A and csc²A    

\frac{1}{cosA}/\frac{1}{sinA}                   Simplify the fraction

sin²A/cos²A = tan²A  

If this answer is correct, please make me Brainliest!

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The following information is obtained from two independent samples selected from two normally distributed populations.
AysviL [449]

A. The point estimate of μ1 − μ2 is calculated using the value of x1 - x2, therefore:

μ1 − μ2 = x1 – x2 = 7.82 – 5.99

μ1 − μ2 = 1.83

 

B. The formula for confidence interval is given as:

Confidence interval = (x1 –x2) ± z σ

where z is a value taken from the standard distribution tables at 99% confidence interval, z = 2.58

and σ is calculated using the formula:

σ = sqrt [(σ1^2 / n1) + (σ2^2 / n2)]

σ = sqrt [(2.35^2 / 18) + (3.17^2 / 15)]

σ = 0.988297

 

Going back to the confidence interval:

Confidence interval = 1.83 ± (2.58) (0.988297)

Confidence interval = 1.83 ± 2.55

Confidence interval = -0.72, 4.38

3 0
3 years ago
PLEASE HELP ME !<br> (2,7); 3x-y =5<br> show all steps !
Zigmanuir [339]

Answer:

i dont think you've got the right (x,y) pair....

Step-by-step explanation:

3x - y = 5

3(2) - 7 = 5

6 - 7 = 5

those are not the correct coordinates for the equation

3 0
2 years ago
There are some red and blue balls in a bag of 21 balls and the probability of picking 2 red balls out in a row is 1/14 how many
Over [174]

Answer:

6 red balls

Step-by-step explanation:

The probability in the first pick

6/21

The probability in the second pick (without replacement)

5/20

the requested probability

(6/21)(5/20) = 30/420

simplification

30/420 = 3/42 = 1/14

Hope this helps

8 0
2 years ago
Read 2 more answers
Help answer this question asap rn
andriy [413]
They most logical answer is A
6 0
2 years ago
Which product is negative?
Elden [556K]

Answer:

Second answer

Step-by-step explanation:

first answer: 4 negative numbers  multiplied = 2 postive numbers multipled = 1 positive number

second answer: 3 negative numbers multiplied = 1 positive number multiplied by 1 negative number = 1 negative number

third answer: Negative and positive numbers multiplied by zero = 0

fourth answer: 2 negative numbers multiplied by 2 positive numbers = 1 positive number multiplied by 1 positive number = positive number.

8 0
2 years ago
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