If U(n) = sin n theta.sec^(n)theta, V(n)...

If `U_(n) = sin n theta.sec^(n)theta, V_(n)=cosnthetasec^(n)theta` for n=0,1,2,……. Then `V_(n)-V_(n-1) + U_(n-1) tan theta =` ?

A

0

B

1

C

`sin theta`

D

`cos theta`

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The correct Answer is:

A

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