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Nana76 [90]
2 years ago
7

1. Prove that 2 tan x / 2- sec^2 x = tan 2x.

Mathematics
1 answer:
Vikentia [17]2 years ago
8 0

Answer:

Step-by-step explanation:

Use trig identities:

1

+

tan

2

x

=

1

cos

2

x

=

sec

2

x

(

1

−

tan

x

)

=

1

+

tan

2

x

−

2

tan

x

=

sec

2

x

−

2

tan

x

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The ratio of the volume of two solids is 1331:729. What is the ratio of the surface area
katovenus [111]
Volume ratio = 1331/729 which is the cube of the linear scale factor.
To find the linear scale factor, let find the cubic root of the numerator & the denominator:

∛1331 = ∛11³  = 11

&  ∛729 = ∛9³  = 9

So the linear scale is 11/9 ==> then the ratio of their surface area will be:

11²/9² ==> 121/81.
Note, if you have a linear scale, then the surface will be the square othis scale & the volume will be the cube of the linear scale
8 0
3 years ago
1) 2x11 =<br> I don’t know how to do this
Fynjy0 [20]

Answer:

22, Twenty Two

Step-by-step explanation:

A good way to look at multiplying 11 is that the number, if it’s under 10, will then be two of that number. For instance, 4 x 11 = 44, 6 x 11 = 66, and so on and so forth.

Hope This Helped!

5 0
2 years ago
Vidriana rolled a number cube 96 times. Her results are shown in the table, what is the experimental probability of rolling an e
hichkok12 [17]

Answer:

50/96

Step-by-step explanation:

I assume the table is:

\left[\begin{array}{cc}Result&Total\\1&15\\2&13\\3&16\\4&17\\5&15\\6&20\end{array}\right]

Even numbers are 2, 4, and 6.  The total number of times she rolled an even number is 13 + 17 + 20 = 50.

So the probability is 50/96.

7 0
2 years ago
How do I state the excluded values for this rational expression: 60x^3/12x
Stella [2.4K]

Answer:

5x^2

Step-by-step explanation:

12 can be taken out from the top and bottom then for the x you subtract

7 0
3 years ago
Verify that f and g are inverse functions <br> f(x)=2x, g(x)=<img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7B2%7D" id="TexFor
Kitty [74]

y=2x

switch x and y

x=2y

solve for y

x/2 =y

this is the same as g(x)

7 0
3 years ago
Read 2 more answers
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