(6) Determine the value: 4 (2tan) : 4 (2tan + tan '! + (2tan -1] 3 t tan

The value of tan 1^@.tan 2^@.tan 3^@ ……….tan 89

The value of tan^-1 1+tan^-1 2+ tan^-1 3 is

The value of (tan 1^(@) tan 2^(@) tan 3^(@) … tan 89^(@) ) is

tan 3A - tan 2 A - tan A = tan 3 A tan 2 A tan A.

What is the value of the expression : (tan 0^@ tan 1^@ tan 2^@ tan3^@ tan 4^@ ______ tan 89^@) (A) 0 (B) 1 (C ) 2 (D) frac(1)(2)