What is the exact value of sin(5π/4) ?

- √2/2  which is approximately same as -0.7071

Step-by-step explanation:

In the 4 quadrants of trigonometry, angle between 0 and 90 degrees have positive sine, cosine and tangent values.

Angles between 90 and 180 degrees have positive sine values while cosine and tangent values are negative.

Angles between 180 and 270 degrees have positive tangent values while sine and cosine values are negative.

Angles between 270 and 360 degrees have positive cosine values while sine and tangent values are negative.

As such,

sin(5π/4) = sin(5×180/4)°

= sin 225°

= - sin(225 - 180)

= - sin 45

= - √2/2 = -0.7071

17 1/3

step-by-step explanation:

we'll this would mean that the dunk tank and the bounce house are the same for 20 hours because the 2 represents that the two activities, and the 20 represents the amount of hours they both are. so with this said, it means that the answer is c. the costs for a dunk tank and bounce house are the same for 20 hours.

c.the costs for a dunk tank and bounce house are the same for 20 hours.

hope this .