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Molodets [167]
3 years ago
11

Integrate with respect to x 2tanx secant^2x/(1+ tan²x)​

Mathematics
1 answer:
Liono4ka [1.6K]3 years ago
8 0

\displaystyle \int \bf \:  \frac{2 \: tan \: x. {sec}^{2} \: x }{1 +  {tan}^{2} \: x }  \:  \: dx  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \\  \\  = 2 \displaystyle \int \bf \:  \frac{tan \: x \: . \:  \cancel{ {sec}^{2}  \: x}}{ \cancel{ {sec}^{2}  \: x}}  \:  \: dx \:  \:  \:  \:  \pink{ \{ \because \:  {sec}^{2}  \: x -  {tan}^{2}  \: x = 1 \}} \\  \\  = 2 \displaystyle \int \bf \: tan \: x \:  \: dx \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\  \\  = 2 \displaystyle \int \bf \:  \frac{sin \: x}{cos \: x}  \:  \: dx \: \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\  \\  = -  2  \displaystyle \int \bf \:   \frac{ -  \: sin \: x}{ \: cos \: x}  \:  \: dx\:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\  \\  =   \bf \: - 2 \ln \:  |cos \: x|  + c\:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \green{ \{ \because \:  \displaystyle \int \bf \:  \frac{ {f}^{′} (x)}{f(x)}  \: dx =  \ln \:  |f(x)|  + c \}}

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Factorise 343m^3 + 27n^3​
Oksanka [162]

answer:m3+27n3

Step-by-step explanation:

Rewrite

27

n

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(

3

n

)

3

.

m

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+

(

3

n

)

3

Since both terms are perfect cubes, factor using the sum of cubes formula,

a

3

+

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=

(

a

+

b

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(

a

2

−

a

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+

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)

where

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=

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4 0
3 years ago
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Sergeu [11.5K]
The answer to this is 9 miles. i included my work below

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3 years ago
What is the mode of this data?<br> 1.7 8.9 3 5.9 3.2 4.1 6.6 0.7
ExtremeBDS [4]

Answer:

The value of Mode is 2.43

Step-by-step explanation:

  • To find the mode of the given data first we have to arrange it in a increasing order then find out mean and median of the given data
  • 0.7,1.7,3,3.2,4.1,5.9,6.6,8.9 is in increasing order
  • For finding the median we need to take the average of 4th and 5th terms because we have the no of terms in the sequence is even not odd so we need to take the average the 4th term=3.2 and the 5th term =4.1
  • so average =(3.2+4.1)/2=3.65
  • so the median is equal to 3.65
  • For mean we have to take the average of the data
  • so mean= sum of all data /no of data
  • mean =(0.7+1.7+3+3.2+4.1+5.9+6.6+8.9)/8=4.26
  • so by using the formula we can get mode
  • <em>Mode=3×Median-2×Mean</em>
  • Mode=3×3.65-2×4.26=2.43
  • ∴The value of Mode is given as 2.43
5 0
4 years ago
1. Find the distance between each pair of points. Round your answer to
zlopas [31]

Step-by-step explanation:

\sqrt{(3 - ( - 4))^{2}  + ( - 7 - 6)^{2} }  \\  =  \sqrt{(3 + 4)^{2}  +  {( - 13)}^{2} }  \\  =   \sqrt{ 49 + 169}  \\   = \sqrt{218} \\  = 14.7648

7 0
3 years ago
Write the range of the function f(x)=-(x+4)^2-3 using set notation
yulyashka [42]

Answer:

(−∞,−3], {y|y≤−3}

Step-by-step explanation:

Is that a answer choice?

3 0
3 years ago
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