3 years ago

Evaluate sin 5pi/4 Thank you

Mathematics

2 answers:

Verizon [17]3 years ago

8 0

Answer:

-sqrt(2)/2

Step-by-step explanation:

5pi/4 lies in the third quadrant with basic angle: 5pi/4 - pi = pi/4

sin(pi/4) = sqrt(2)/2

Since it's in quadrant 3, sin would be negative

sin(5pi/4) = -sqrt(2)/2

sqrt: square root

kondaur [170]3 years ago

3 0

Answer:

3.92699081699

Step-by-step explanation:

$\frac{5(3.14)}{4}\\$ =15.7/4

You might be interested in

Solve the system of equations using the substitution method.

Delicious77 [7]

Answer:

$x = 14$

$y = -3$

Step-by-step explanation:

Given

$2x + 8y =4$

$x = -3y + 5$

Required

Solve

Substitute $x = -3y + 5$ in $2x + 8y =4$

$2(-3y + 5) + 8y =4$

Open bracket

$-6y + 10 + 8y =4$

Collect like terms

$-6y + 8y =4-10$

$2y =-6$

Divide both sides by 2

$y = -3$

Substitute $y = -3$ in $x = -3y + 5$

$x = -3 * -3 + 5$

$x = 9+ 5$

$x = 14$

8 0

3 years ago

There are 36 math books and 9 reading books. What is the ratio of the total number of books to the number of math books? Remembe

brilliants [131]

Answer:

$\frac{4}{5}$

Step-by-step explanation:

so its 36+9 = 45

36/45=4/5

8 0

3 years ago

Jimena used her calculator to divide 2 by 13 the calculator screen shows the number :0.1538461 round jimena's answer to the near

KonstantinChe [14]

The answer is 0.15 !!!!!

6 0

3 years ago

one gallon of gasoline in Buffalo New York cost $2.29 and Toronado Canada one liter of gasoline cost 91 cents there are 3.8 lite

pashok25 [27]

For one gallon of gas in Canada it would cost 3.45, and since it only costs 2.29 in New York.. Tonado has the greater price for gas

5 0

4 years ago

Reena has 12 more dimes than she does quarters. If Reena has a total of 28 coins, how many quarters, qq, and how many dimes, dd,

mel-nik [20]

B.
It is the only one with a total of 28 coins and with 12 more dimes than quarters.

8 0

3 years ago