It's hard to type and hard to read the "inverse tangent" function, as you've seen (above).

So, use "arctan x" instead.

Then the problem becomes: "differentiate cos (arctan x)."

You must apply first the rule for differentiating the cosine function, and next apply the rule for differentiating the arctan function:

(d/dx) cos (arctan x) = - sin (arctan x) * [1/(1+x^2)]

7 0

3 years ago

The population of a town increased from 5,400 to 6,000 people. What was the percent of the increase?

iren [92.7K]

Since, the population of a town increased from 5,400 to 6,000 people. We have to calculate the percent of increase.

Firstly, we will find the difference of 6000 and 5400,

6000-5400 = 600

Secondly, we will divide 600 by 5400,

So, $\frac{600}{5400}$ = 0.1111

Thirdly, we will multiply 0.1111 by 100%

= 11.11 %

Therefore, there is 11.11% increase in the population of a town.

7 0

3 years ago

Read 2 more answers

(-11 x +3 ) -2 (-11/4 x -5/2) .

STatiana [176]

Answer:

- 11/2x + 8

Step-by-step explanation:

5 0

3 years ago