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If f (alpha) =x cos alpha + y sin alpha ...

If `f (alpha) =x cos alpha + y sin alpha - p (alpha),` then the lines `f (alpha)=0 and f (beta)=0` ar perpendicular to each other, if

A

`alpha = beta`

B

`alpha + beta =(pi)/(2)`

C

`|alpha - beta| =(pi)/(2)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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