यदि 0^(@) lt A lt 90^(@) है, तो tan^(2)A...

यदि `0^(@) lt A lt 90^(@)` है, तो `tan^(2)A + cot^(2) A - sec^(2)A cosec^(2)A` का मान है-

A

0

B

1

C

2

D

`-2`

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The correct Answer is:

D

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