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3 years ago

15

How do you solve for tan-1 or tan theta without using a calculator? I don't want to rely on the calculator to solve problems tha

t involve this. Thank you :).

1 answer:

alexgriva [62]3 years ago

5 0

Answer:

Step-by-step explanation:

You need to use a calculator.

It is however useful to remember some values for tangents.

For example tan 45 degrees = 1.

Tan 30 = 1 /√3 and tan 60 = √3.

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Choose the graph that represents the following system of inequalities: y ≥ −3x + 1 y ≤ 1 over 2x + 3 In each graph, the area for

svet-max [94.6K]

Answer:

Correct graph is C

Step-by-step explanation:

Given two inequalities are:

1. $y\leq -3x+1$

2. $y\leq x+3$

Step1 : Remove the inequalities

1. $y=-3x+1$

2. $y=x+3$

Step2 : Finding intersection points of equations

By solving linear equation

$y=-3x+1=x+3$

$-3x+x+3$

$x=-0.5$

Replacing value of x in any equations

we get,

$y=x+3\\$

$y=-0.5+3$

$y=2.5$

Therefore, Point of intersection is (-0.5,2.5)

Step3: Test of origin (0,0)

Here, If inequalities holds true for origin then, shades the graph towards the origin.

For equation 1.

$y\leq -3x+1$

$0\leq -3(0)+1$

$0\leq +1$

True, Shade graph towards origin.

For equation 2.

$y\leq x+3$

$0\leq 0+3$

$0\leq 3$

True, Shade graph towards origin.

Thus, Correct graph is C

6 0

3 years ago

PLEASE HELP!! What is the value of x?

Black_prince [1.1K]

To find x, first we'll split the triangle in two right triangles.

The first triangle will be the one with sides (8,x+4,y) and the second triangle will be the one with sides (12,2x+1,y).

As you can see, these two triangles share the side 'y'.

To solve we'll do the following; first solve for 'y' by applying the Pythagorean theorem in the second triangle, and finally solve for 'x' applying Pythagorean theorem in the first triangle.

From the second triangle (12,2x+1,y) we solve for 'y' by writing:
$y^{2}=12^{2}- (2x+1)^{2}=144-4 x^{2} -4x-1=$

Now that we know 'y^2' we apply Pythagorean Theorem in the first triangle (8,x+4,y)
$8^{2}= (x+4)^{2}+ y^{2}= (x^{2}+8x+16)+(143-4 x^{2} -4x)$
$64=159-3 x^{2} +4x$

Now you solve the quadratic equation, you'll get a positive and negative value; as this are lengths, you take the positive and get:

$x= \frac{19}{3}$

5 0

4 years ago

Nancy needs to board her dog. Doggy care will take the dog for the initial fee of $5.00 and then $0.75 per hour. Dogs ate us wil

DaniilM [7]

Answer: 10 hours

Explanation:
These equations intercept at (10,12.5)

The equation for doggy care is f(x) = 0.75x+5
The equation for Dogs are Us is f(x) = 0.95x +3

The best thing do is to graph these then to make a table for both and then see when there’s a point on both tables that are the same

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3 years ago

If you spin the spinner, what is the probability of the pointer landing in the y section

german

Answer:

1/8

Step-by-step explanation:

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3 years ago

Help plz ill give extra points

My name is Ann [436]

Answer:

It wont let you listen to the sound thing

Step-by-step explanation:

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3 years ago

Read 2 more answers