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Let f(n)=2 cos nx AA n in N, then f(1)f(...

Let `f(n)=2 cos nx AA n in N`, then `f(1)f(n+1)-f(n)` is equal to

A

`f(n+3)`

B

`f(n+2)`

C

`f(n+1)f(2)`

D

`f(n+2)f(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-COMPOUND ANGLES-PRACTICE SHEET (EXERCISE - I) LEVEL - I
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