3 years ago

Sin3x-sinx/cos3x-cosx=-cot2x

Mathematics

1 answer:

slavikrds [6]3 years ago

5 0

Reduce terms: (sin x + sin 3x)/(cos x - cos 3x) =cos(2x)/sin (2x)

(sin x + sin 3x)/(cos x - cos 3x) = cot (2x)

The last line proves the identity (sin x + sin 3x)/(cos x - cos 3x) = cot (2x)

You might be interested in

* if my savings of $x grows 10% each year how much money would i have in 1 year

german

Answer:

10/100*$x

Step-by-step explanation:

You will multiply the $x by 10%

5 0

3 years ago

Which is larger 1000 feet or 300 yards?

Alexus [3.1K]

1 yard = 3 feet

300 yards = (3 ft) x (300) = 900 feet

<em>1,000 feet</em> is larger than 900 feet. It's also longer and farther.

5 0

3 years ago

Find the limit of the function by using direct substitution as X approaches one lim(x^2-8x -2)

Leno4ka [110]

Answer:

$lim_{x \to 1} x^2 -8x -2 =-9$

Step-by-step explanation:

For this case we want to find the following limit:

$lim_{x \to 1} x^2 -8x -2$

And we can find the limit distirbuting into each term like this:

$\lim_{x \to 1} x^2 -8 lim_{x \to 1} x -lim_{x \to 1} 2$

And replacing we got:

$1^2 - 8*1 -2 = 1-8-2 = -9$

So then the final answer for this case is:

$lim_{x \to 1} x^2 -8x -2 =-9$

8 0

4 years ago

10y + 10 =130 solve for y

aniked [119]

Answer: y=12

Step-by-step explanation:

10y+10=130

-10 -10

10y=120

—- ——

10. 10

Y=12

5 0

4 years ago

The sample space for a roll of two number cubes is shown in the table.

lara [203]

The correct answer is Choice A: 1/6

If you look at the table, there are 6 spots where the 2 numbers are the same. They are in a diagonal row from the bottom left to the top right.

6 out of 36 makes the fraction 6/36 which is 1/6

5 0

3 years ago