2 years ago

Find the geometric means of the following sequence -7, ?, ?, ?, ?, -1, 127, 357

Mathematics

1 answer:

Free_Kalibri [48]2 years ago

4 0

18,267, 2728,2729110,72829183836,261729340

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Simplify sin^2y/sec^2 y−1 to a single trigonometric function

liubo4ka [24]

Answer:

$\frac{ { \sin}^{2} y}{ { \sec}^{2}y - 1 } = { \cos }^{2} y$

Step-by-step explanation:

We know that ${ \tan }^{2} y = { \sec }^{2} y - 1$

Also , ${ \tan}^{2} y = \frac{ { \sin }^{2} y}{ { \cos }^{2}y }$

So ,

$\frac{ { \sin }^{2}y }{ { \sec }^{2}y - 1 } = \frac{ { \sin}^{2} y}{ { \tan }^{2} y} = \frac{ { \sin }^{2}y }{ \frac{ { \sin}^{2} y}{ { \cos}^{2}y } } = { \cos }^{2} y$

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2 years ago

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3 years ago

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The total number of books in the library is 1155.there are 20 times more nonfiction books than fiction books. How many fiction b

alekssr [168]

There is 20x more nonfiction than fiction so you do
20+1=21
so then to find out what $\frac{1}{21}$ of 1155 is we do
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to check whether we are right we can do
1100=55=1155
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3 years ago

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