Evaluate the integral. (Use C for the constant of integration.) int sqrt(33+8x-x^2)dx Evaluate the integral. int_0^(pi/2)(cos t)/(sqrt(1+sin^2t))dt Evaluate the integral. int_1^2(4y^2-6y-12)/(y(y+2)(y-3))dy Evaluate the integral. (Remember to use ln |u| where appropriate. Use C for the constant of integration.) int 9 cos^2 x tan^3 x dx

Emenuele96j

Emenuele96j

Answered question

2022-12-19

Evaluate the integral. (Use C for the constant of integration.)
33 + 8 x x 2
Evaluate the integral.
0 p i 2 cos t 1 + sin 2 t d t
Evaluate the integral.
1 2 4 y 2 6 y 12 y ( y + 2 ) ( y 3 ) d y
Evaluate the integral. (Remember to use ln | u | where appropriate. Use C for the constant of integration.)
9 cos 2 x tan 3 x d x

Answer & Explanation

podcastsslu88

podcastsslu88

Beginner2022-12-20Added 5 answers

1)
33 + 8 x x 2 d x = 49 ( x 4 ) 2 d x = 7 2 ( x 4 ) 2 d x
we have a 2 x 2 d x = 1 2 x a 2 x 2 + 1 2 a 2 tan 1 ( x a 2 x 2 ) + C
Here a = 7
33 + 8 x x 2 d x = 7 2 ( x 4 ) 2 d x = 1 2 ( x 4 ) 49 ( x 4 ) 2 + 1 2 49 tan 1 ( ( x 4 ) 49 ( x 4 ) 2 ) + C = 1 2 ( x 4 ) 33 + 8 x x 2 + 49 2 tan 1 ( ( x 4 ) 33 + 8 x x 2 ) + C
2)
0 π 2 cos ( t ) 1 + sin 2 ( t )
let sin ( t ) = u
cos ( t ) d t = d u
cos ( t ) 1 + sin 2 ( t ) d t = [ ln | sin ( t ) + 1 + sin 2 ( t ) | ] 0 π 2 = ln | 1 + 1 + 1 | ln | 0 + 1 + 0 | = ln | 1 + 2 |
sendetimejhn

sendetimejhn

Beginner2022-12-21Added 1 answers

3)
1 2 4 y 2 6 y 12 y ( y + 2 ) ( y 3 ) d y
4 y 2 6 y 12 y ( y + 2 ) ( y 3 ) = A y + B y + 2 + C y 3 4 y 2 6 y 12 = A ( y + 2 ) ( y 3 ) + B y ( y 3 ) + C y ( y + 2 )
put y = 0
12 = A ( 0 + 2 ) ( 0 3 ) A = 2
4 y 2 6 y 12 = 2 ( y + 2 ) ( y 3 ) + B y ( y 3 ) + C y ( y + 2 )
put y = 2
16 + 12 12 = B ( 2 ) ( 2 3 ) B = 8 5
4 y 2 6 y 12 = 2 ( y + 2 ) ( y 3 ) + 8 5 y ( y 3 ) + C y ( y + 2 )
put y = 3
4 9 18 12 = 0 + 0 + C 3 ( 3 + 2 ) C = 2 5
4 y 2 6 y 12 y ( y + 2 ) ( y 3 ) = 2 y + 8 5 ( y + 2 ) + 2 5 y 3 )
1 2 4 y 2 6 y 12 y ( y + 2 ) ( y 3 ) d y = 1 2 ( 2 y + 8 5 ( y + 2 ) + 2 5 y 3 ) ) d y = [ 2 ln | y | + 8 5 ln | y + 2 | + 2 5 ln | y 3 | ] 1 2 = 2 ln | 2 | + 8 5 ln | 4 | + 2 5 ln | 1 | 8 5 ln | 3 | 2 5 ln | 2 | = 8 5 ln | 2 | + 8 5 ln | 4 | 8 5 ln | 3 | = 8 5 ln ( 8 3 )
4)
9 cos 2 ( x ) tan 3 ( x ) d x = cos 2 ( x ) sin 3 ( x ) cos 3 ( x ) d x = 9 sin 3 ( x ) cos ( x ) d x = 9 sin 2 ( x ) cos ( x ) sin ( x ) d x = 9 ( 1 cos 2 ( x ) ) cos ( x ) sin ( x ) d x
let cos ( x ) = t
= 9 ( 1 t 2 ) t d t = ( 9 t 9 t ) d t = 9 t 2 2 ln | t | + C = 9 cos 2 ( x ) 2 9 ln | cos ( x ) | + C

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