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Serggg [28]
3 years ago
11

Verify that -tan2x = (2tanx) / (sec^2x - 2)

Mathematics
1 answer:
sashaice [31]3 years ago
8 0

Answer:

Below.

Step-by-step explanation:

- tan 2x =   -2tanx / (1 - tan^2x)

Using the identity  tan^2x = sec^2x - 1 and substituting for tan^2x:

- tan 2x = -2 tanx / (1 - (sec^2x - 1))

=   2 tanx / ( - 1(sec^2x + 2))

= 2 tan x / (sec^2 x - 2)

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Help me on this please
Rudik [331]
The paper is 16 cm by 34 cm to start with, so we started with area
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A circle of diameter 16 cm has been removed. The area of that circle is
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Then the area of the paper that remains is
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5 0
3 years ago
Plz help this is due tonight and I have no clue :(
motikmotik
Section 1:

using this format we can determine what the answer is:

42 105
—— • ——-
100 x

(the spacing may be off but imagine two separate fractions)

first multiply 100 by 105 to get 10,500

then divide by 42 to get 250

this means that sasha’s book has 250 pages

section b:

using the same formula we can solve this problem:

first we need to multiply 250 by 2 to get the total cost of both tickets

175 x
—— • ——
100 500

(again spacing may be off but think of two separate fractions)

then multiply 500 by 175 to get 87,500

then divide by 100 to get 875

to find the profit subtract 875-500

this means he will make $375 profit

conclusion:

sasha’s book has 250 pages

trevor will make $375 profit

this is the method my teacher taught me last year so it should be right, hope this helps and please mark brainliest!!
8 0
3 years ago
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2 years ago
Write the name of the period that has the digits 913
salantis [7]
Nine hundred thirteenths if this is a decimal
3 0
3 years ago
HELPPPP look at image
posledela
Your answer would be 24 and 168
take the 48 and divide by 4 to get the 1st one then just multiply 24 by 7 and you get 168
5 0
3 years ago
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