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if cot^-1alpha+cot^-1beta=cot^-1x then x...

if `cot^-1alpha+cot^-1beta=cot^-1x` then `x`

A

(a) ` alpha+beta`

B

(b) `alpha-beta`

C

(c) `(1+alphabeta)/(alpha+beta)`

D

(d) `(alphabeta-1)/(alpha+beta)`

Text Solution

Verified by Experts

The correct Answer is:
D
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