Question

p² cot
A B
cot cot
2 2​

Answer 1

The required option "B. " is correct.

Step-by-step explanation:

We have,

                .....(1)

and         .....(2)

To find, the value of  

Squaring (1) and (2) and subtracting them, we get

⇒  

⇒

⇒  

[∵ ]

⇒  

Hence, the required option "B. " is correct.