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int cos 4x cos 3x dx=...

`int cos 4x cos 3x dx=`

A

`(1)/(2)[-(1)/(7) sin 7x+sin ]+c`

B

`(1)/(2)[(1)/(7) sin 7x+sin ]+c`

C

`(1)/(2)[(1)/(7) sin 7x-sin ]+c`

D

none

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • int sin 4x cos 3x dx =

    A
    `(1)/(2) `(cos 7x + cos x ) + c
    B
    `(1)/(14)` ( cos 7x + `(1)/(2)` cos x ) + c
    C
    `- (1)/(14)` (cos 7x + 7 cos x ) + c
    D
    `(1)/(14)` (cos 7x + 7 cosx ) + c

  • int sin 5x cos 3x dx=

    A
    `(1)/(2)[(cos 2x)/(2)+(1)/(8) cos 8x]+c`
    B
    `(1)/(2)[-(cos 2x)/(2)+(1)/(8) cos 8x]+c`
    C
    `(1)/(2)[-(cos 2x)/(2)-(1)/(8) cos 8x]+c`
    D
    none

  • int cos x cos 2x cos 3x dx=

    A
    `(1)/(4)[(1)/(6) sin 6x+(1)/(2) sin -(1)/(4)sin 4x+x]+c`
    B
    `(1)/(4)[(1)/(6) sin 6x-(1)/(2) sin -(1)/(4)sin 4x+x]+c`
    C
    `(1)/(4)[(1)/(6) sin 6x+(1)/(2) sin2x +(1)/(4)sin 4x+x]+c`
    D
    none

    • Similar Questions

    Explore conceptually related problems

    Evaluate the integerals. int cos x cos 3x dx on R.

    Evaluate the integerals. int cos x cos 2x dx on R.

    Show that int_(0)^(pi//4) x cos x cos 3 x dx = (pi-3)/(16)

    Evaluate the following integral int e^(2x) cos x cos 3x dx

    int (cos 2x)/(cos x)dx=

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