Inverse Trigonometric FunctionMedium
Question
The value of tan-1 
+ tan-1 (cot A) + tan-1 (cot3 A) for 0 < A < (π / 4) is -
+ tan-1 (cot A) + tan-1 (cot3 A) for 0 < A < (π / 4) is - Options
A.4 tan-1 (1)
B.2 tan-1 (1)
C.0
D.none
+ tan-1 (cot A) + tan-1 (cot3 A) for 0 < A < (π / 4) is -