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2 years ago

What is the exact value of tan -13pi/6 and also the explanation

2 answers:

mihalych1998 [28]2 years ago

7 0

$tan\left(-\frac{13\pi}{6}\right)=-tan\left(2\frac{1}{6}\pi\right)=-tan\left(2\pi+\frac{1}{6}\piright)=-tan\frac{1}{6}\pi=-\frac{\sqrt3}{3}$

Thepotemich [5.8K]2 years ago

5 0

Unit circle! XD
Pi/6 is in the 30 degree family. What I do is multiply it by 180/pi to get it into degrees. Once you do this, the answer is -390

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6 3/5 divided by 2 3/4

Otrada [13]

It is 27/20 or another way to write it is 1 7/20 or 1.35

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2 years ago

Read 2 more answers

The height of a flare fired from the deck of a ship in distress can be modeled by h=-16t^2+104t+56, where h is the height of the

grin007 [14]

Answer:

7 seconds.

Step-by-step explanation:

We have been given that the height of a flare fired from the deck of a ship in distress can be modeled by $h=-16t^2+104t+56$ , where h is the height of the flare above water and t is the time in seconds.

The ball will hit the ground, when height will be 0 meters, so we will equate $h=0$ to find the time when ball will hit the ground as:

$-16t^2+104t+56=0$

Using quadratic formula, we will get:

$t=\frac{-104\pm\sqrt{104^2-4(-16)(56)}}{2(-16)}$

$t=\frac{-104\pm\sqrt{10816+3584}}{-32}$

$t=\frac{-104\pm\sqrt{14400}}{-32}$

$t=\frac{-104\pm120}{-32}$

$t=\frac{-104+120}{-32}\text{ or }t=\frac{-104-120}{-32}$

$t=\frac{16}{-32}\text{ or }t=\frac{-224}{-32}$

$t=-\frac{1}{2}\text{ or }t=7$

Since time cannot be negative, therefore, it will take 7 seconds for the flare to hit the ground.

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3 years ago

Simplify to create an equivalent expression.<br><br> 3n+2(-2n-1)

nikitadnepr [17]

3n - 4n - 2

-n - 2

-n - 2 is the simplest form

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2 years ago

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Luden [163]

Answer:

Step-by-step explanation:

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2 years ago

First drop down menu: 8.5, 40, 4, 7.5, 0

sashaice [31]

1st: 0.5 x 8 = 4

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2 years ago