Given the integral

first substitute y = 3x and dy = 3 dx :

then rewrite tan(y) = sin(y)/cos(y) and substitute z = cos(y) and dz = -sin(y) dy :

Recall that 1/z is the derivative of ln|z|. Then back-substitute to get the result in terms of x :



20% of 410 equals 82... YOURE welcome
The area of regular polygon with 5 sides is 689.65m²
<u>Explanation:</u>
All sides of a regular polygon are equal in length. If you know the length of one of the sides, the area is given by the formula:

where
s is the length of any side
n is the number of sides
tan is the tangent function calculated in degrees
Let the number of side of a polygon be 5. So, putting the values in equation

Therefore, the area of regular polygon with 5 sides is 689.65m²