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If u =-f''(theta) sintheta + f'(theta) c...

If `u =-f''(theta) sintheta + f'(theta) costheta` and `v = f''(theta) costheta + f'(theta) sintheta`,then `int[(du/(d theta))^2+(dy/(d theta))^2]^(1/2)d theta` is equal to

A

`f ( theta ) - f' ' (theta)+C`

B

`f ( theta )+ f ' ' ( theta) +C `

C

`f ' ( theta ) + f ' ' ( theta)+C `

D

`f ' ( theta ) - f ' ' (theta ) +C `

Text Solution

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The correct Answer is:
B
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