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3 years ago

5n+3n=40Pls give me an answer and solution....

Mathematics

2 answers:

nevsk [136]3 years ago

8 0

Answer:

3 times 5 = 15 and 5 times 5 = 25. 15 plus 25 = 40

Step-by-step explanation:

ale4655 [162]3 years ago

3 0

N=5.
move all terms that don’t contain n to the right side and solve

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4 years ago

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Find the integration of (1-cos2x)/(1+cos2x)

slega [8]

Given:

The expression is:

$\dfrac{1-\cos 2x}{1+\cos 2x}$

To find:

The integration of the given expression.

Solution:

We need to find the integration of $\dfrac{1-\cos 2x}{1+\cos 2x}$ .

Let us consider,

$I=\int \dfrac{1-\cos 2x}{1+\cos 2x}dx$

$I=\int \dfrac{2\sin^2x}{2\cos^2x}dx$ $[\because 1+\cos 2x=2\cos^2x,1-\cos 2x=2\sin^2x]$

$I=\int \dfrac{\sin^2x}{\cos^2x}dx$

$I=\int \tan^2xdx$ $\left[\because \tan \theta =\dfrac{\sin \theta}{\cos \theta}\right]$

It can be written as:

$I=\int (\sec^2x-1)dx$ $[\because 1+\tan^2 \theta =\sec^2 \theta]$

$I=\int \sec^2xdx-\int 1dx$

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Therefore, the integration of $\dfrac{1-\cos 2x}{1+\cos 2x}$ is $I=\tan x-x+C$ .

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3 years ago

5n+3n=40Pls give me an answer and solution.... ​

5n+3n=40Pls give me an answer and solution....