Maths-

General

Easy

Question

# Let A = and B = then AB = 0, if-

- n = 0, 1, 2, …….
- = n n = 0, 1, 2, ……
- + (2n +1) , n = 0, 1, 2, ……
- + n, n = 0, 1, 2, …..

## The correct answer is: + (2n +1) , n = 0, 1, 2, ……

### AB =

AB =

AB = 0 cos = 0

cos = cos (2n +1) where n = 0, 1, 2, …

= (2n +1) + where n = 0, 1, 2, ……

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