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2 years ago

−2/3−(−1 1/3) pls answer as soon as possible

Mathematics

1 answer:

Kitty [74]2 years ago

8 0

The answer is 3 to subtract the fractions, find the LCD and then combine

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Prove identity trigonometric equation

irina [24]

Explanation:

The given equation is False, so cannot be proven to be true.

Perhaps you want to prove ...

$2\tan{x}=\dfrac{\cos{x}}{\csc{(x)}-1}+\dfrac{\cos{x}}{\csc{(x)}+1}$

This is one way to show it:

$2\tan{x}=\cos{(x)}\dfrac{(\csc{(x)}+1)+(\csc{(x)}-1)}{(\csc{(x)}-1)(\csc{(x)}+1)}\\\\=\cos{(x)}\dfrac{2\csc{(x)}}{\csc{(x)}^2-1}=2\cos{(x)}\dfrac{\csc{x}}{\cot{(x)}^2}=2\dfrac{\cos{(x)}\sin{(x)}^2}{\cos{(x)}^2\sin{(x)}}\\\\=2\dfrac{\sin{x}}{\cos{x}}\\\\2\tan{x}=2\tan{x}\qquad\text{QED}$

We have used the identities ...

csc = 1/sin

cot = cos/sin

csc^2 -1 = cot^2

tan = sin/cos

4 0

2 years ago

what is the volume of a rectangular prism that has a length of 8.5 centimeters (cm), a width of 3.2 centimeters, and a height of

Yuki888 [10]

Answer:

The volume of the rectangular prism is $163.2cm^3$

Step-by-step explanation:

A rectangular prism is in the shape of cuboid which has three dimensions i.e Length, width and height.

Given: Length =8.5 cm width= 3.2 cm and Height= 6 cm

The volume of a Cuboid = $Length*Width*Height$

Applying the given dimensions in the formula:

The volume of a Cuboid= $8.5cm*3.2cm*6cm$

= $163.2cm^3$

The volume of the rectangular prism is $163.2cm^3$

3 0

2 years ago

1-1= what i need to know.

eduard

Answer:

0 is the answer same as 0+0=0

hope this helps

have a good day :

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

Please help me with these rotation problem.

FrozenT [24]

Answer:

see below

Step-by-step explanation:

In the attachment, the points are listed in the order given in the problem statement. (They are listed to the right of the "rotation matrix", with x-coordinates above y-coordinates.)

I really don't like to do repetitive calculations, so I try to use a graphing calculator or spreadsheet whenever possible. Angles are measured CCW.

As always, the rotation transformations are ...

180° — (x, y) ⇒ (-x, -y)

270° — (x, y) ⇒ (y, -x)

3 0

3 years ago

James works as a waiter. He served meals with bills of $23.59, $40.65, &30.50, and $15.86. If his total for tips was 17.67,

stira [4]

If you add up all of the money he made and divide it by the amount he made via tips, you will see that the percent tip he received was 16%

3 0

2 years ago