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int(sec xdx)/(sqrt(sin(2x+A)+sinA)) " is...

`int(sec xdx)/(sqrt(sin(2x+A)+sinA)) " is equal to "`

A

`(secA)/(sqrt(2))sqrt(tanx cosA-sinA)+c`

B

`sqrt(2)secAsqrt(tanx cosA-sinA)+c`

C

`sqrt(2)secAsqrt(tanx cosA+sinA)+c`

D

non of these

Text Solution

Verified by Experts

The correct Answer is:
C
`I=int(sec x dx)/(sqrt(2sin(x+A)cosx))`
`=int(sec^(2)x dx)/(sqrt((2sin(x+A))/(cosx)))`
`=(1)/(sqrt(2))int(sec^(2)x dx)/(sqrt(tanx cosA+sinA))`
`=(secA)/(sqrt(2))int(2pdp)/(p) " " (tanx cosA+sinA=p^(2), " then " cosA sec^(2)x dx=2pdp)`
`=sqrt(2)secA int dp `
` =sqrt(2)secA sqrt(tanx cosA+sinA)+C`
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CENGAGE-INDEFINITE INTEGRATION-Exercise (Single)
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  3. int(sec xdx)/(sqrt(sin(2x+A)+sinA)) " is equal to "

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  4. int(cos2x)/((e^(-x)+cosx)sqrt(1+sin2x))dx,x in(0,(pi)/(2)) is equal t...

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  11. The value of the integral int((1-costheta)^(2/7))/((1+costheta)^(9/7))...

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  12. If int(dx)/(sqrt(sin^(3)xcos^(5)x))=a sqrt(cot x)+bsqrt(tan^(3)x)+c, t...

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  13. "I f"int(dx)/(cos^3xsqrt(sin2x))=a(tan^2x+b)sqrt(tanx)+c

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  14. If int(dx)/((x+2)(x^(2)+1)) = alog|1+x^(2)|+btan^(-1)x+ 1/5log|x+2|+C,...

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  15. Ifint(3e^x-5e^(-1))/(4e^x+5e^(-x))dx=a x+bln(4e^x+5e^(-x))+C ,t h e n

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  17. int(x^9)/((4x^2+1)^6) dx is equal to

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  18. If int1/(xsqrt(1-x^3))dx=alog|(sqrt(1-x^3)-1)/(sqrt(1-x^3)+1)|+b ,t h...

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  19. The value of the integral int(x^2+x)(x^(-8)+2x^(-9))^(1/(10))dx is 5/(...

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