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
vichka [17]
3 years ago
15

Evaluate sin^2 (pi/4) + cos^2(pi/4) + cos.

Mathematics
1 answer:
mart [117]3 years ago
3 0

The answer of sin^2 (pi/4) + cos^2 (pi/4) is √ 2

<u>Step-by-step explanation:</u>

The value of sin^2 (pi/4) = √2/ 2

The value of cos^2 (pi/4) = √2/ 2

=  √2/ 2 +  √2/ 2

=  √2 +  √2 / 2

= 2 √2 / 2

Dividing √2 by 1

= √2

You might be interested in
Given that (-1, a) is the midpoint of the line segment joining (0, -2) and (b, 8) then find the values of a and b
Nikitich [7]

Answer: a=3 & b=-2


Step-by-step explanation:


6 0
3 years ago
Find the product of (x + 5)(x − 5).
AfilCa [17]

Answer:

x² - 30 + 5x

Step-by-step explanation:

(x + 5)(x − 5)

=x(x − 5)+5(x − 5)

=x² - 5 + 5x - 25

=x² - 30 + 5x

6 0
3 years ago
The percentage of people under the age of 18 was 23.5% in New York City, 25.8% in Chicago, and 26% in Los Angeles.
Hatshy [7]

Answer:

0.0158 = 1.58% probability that all of them are under 18.

Step-by-step explanation:

Probability of independent events:

If three events, A, B and C are independent, the probability of all happening is the multiplication of the probabilities of each happening, that is:

P(A \cap B \cap C) = P(A)P(B)P(C)

The percentage of people under the age of 18 was 23.5% in New York City, 25.8% in Chicago, and 26% in Los Angeles.

This means that P(A) = 0.235, P(B) = 0.258, P(C) = 0.26

If one person is selected from each city, what is the probability that all of them are under 18?

Since the three people are independent:

P(A \cap B \cap C) = 0.235*0.258*0.26 = 0.0158

0.0158 = 1.58% probability that all of them are under 18.

8 0
3 years ago
How do you find inverses
MrMuchimi

How To Find Inverses:

1. First, replace f(x) with y . ...

2. Replace every x with a y and replace every y with an x .

3. Solve the equation from Step 2 for y . ...

4. Replace y with f−1(x) f − 1 ( x ) . ...

5. Verify your work by checking that (f∘f−1)(x)=x ( f ∘ f − 1 ) ( x ) = x and (f−1∘f)(x)=x ( f − 1 ∘ f ) ( x ) = x are both true.

5 0
3 years ago
Read 2 more answers
HELPPP . sorry for cracked. screen.. Identify w as either rational or irrational
Evgesh-ka [11]

Answer:

Irrational: √2 = 1.4

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • the length of a rectangular prism is 2/3 yards the width 5/6 yard the height 4/5 yard what is the volume?
    15·1 answer
  • Yo Please Help 25 Points and BRAINLEIST
    7·1 answer
  • Please help me with the question below
    10·2 answers
  • To convert kilograrns to grams, you can use the ratio<br><br> 1000grams/1kilogram
    15·1 answer
  • What is 2/3 dived by the greatest comman facter of 4 and 8?
    9·2 answers
  • I WILL GIVE BRAINLIST
    13·1 answer
  • Jannete has 326 pennies, 64 nickles, and 15 dimes. if she has to exchange her coins for dollars how many dollars will she have ?
    14·1 answer
  • What does the graph for y=-3x look like
    10·1 answer
  • Plssss help I’ll mark you!
    5·1 answer
  • If each of these runners travels the indicated number of spaces in the same amount of time, at which numbered spot will all of t
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!