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SIZIF [17.4K]
3 years ago
7

An angle in standard position measures pi/2 radians, and P(0, 1) is on the terminal side of the angle. What is the value of the

cosine of this angle
-1
0
1
undefined
Mathematics
2 answers:
WARRIOR [948]3 years ago
7 0
Angles could be expressed in degrees or in radians. The relationship between the two could be easily explained by illustrating a circle. A semi-circle has a total angle of 180°. This is equal to a π radians. So if the angle is π/2, in degrees, that would be 180/2 = 90°. 

Then, determining the cosine 90° in a calculator would yield an answer of zero.
Vika [28.1K]3 years ago
4 0

Answer:

B is correct :)

Step-by-step explanation:

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Arturiano [62]

Answer:

  BD = √97 cm ≈ 9.849 cm

Step-by-step explanation:

Diagonal BD of rectangle ABCD is the hypotenuse of right triangle ABD. Opposite sides of the rectangle are the same length, so we have ...

  AB = 4 cm

  AD = 9 cm

The sides are related to the diagonals by the Pythagorean theorem.

<h3>Pythagorean theorem</h3>

The Pythagorean theorem tells you the relation between sides and hypotenuse of a right triangle:

  AB² +AD² = BD²

  4² +9² = BD² = 16 +81 . . . . . evaluating the squares

  BD = √97 . . . . . take the square root

The length of BD is √97 cm, about 9.849 cm.

6 0
2 years ago
Solve for t. d=−16t^2 +4t
AleksAgata [21]

Answer:

C option is correct.

t = 8 +- √ 1− 4 d

Step-by-step explanation:

d=−16t^2 +4t

t= (1+ √ 1− 4 d) /  8

 t = (1 − √ 1 − 4 d  ) / 8

3 0
2 years ago
PLEASE HELP EASY MATH!! NO LINKS! NEED FULL EXPLANATION!! (WILL GIVE BRAINLYIST!)
LenaWriter [7]

Answer:

Step-by-step explanation:

A

2x3 is 6x4 is 24+5 is 29

B

6+20 is 26

C

9x5 is 45

D

6+8 is 14x5 is 70

SO THIS MEANS THAT B IS YOUR ANSWER

4 0
3 years ago
An anthropologist visits an igloo with a circular floor. While there, she measures it and calculates that it has a circumference
pickupchik [31]

Answer:

The diameter of the floor is 6 yards

Step-by-step explanation:

Here, we are to calculate the diameter of a circular floor that has a circumference of 18.84 yards

Mathematically,

C = π * D

where C is the circumference

Plugging the values of the circumference , we have ;

18.84 = 22/7 * D

7 * 18.84 = 22D

D = (7* 18.84)/22 = 5.99 which is approximately 6 yards

5 0
3 years ago
Leona is having a birthday party on Sunday. Jeanette wants to know how many people will be coming. Leona tells her that there wi
konstantin123 [22]

Answer:77 and 87

Step-by-step explanation:

7×6=42 + 5+7=35/\ 35+42=77(first outcome)

7×6=42 + 5×9=45/\42+45=87 (second outcome.

7 0
2 years ago
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