What is the value of `tan 1^(@) tan 2^(@) tan 3^(@)` .......... `tan 89^(@)` ?

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

The value of tan1^(@)tan2^(@)tan3^(@)...tan89^(@) is

The value of tan1^(@)tan2^(@)tan3^(@)...tan89^(@) is

What is the value of (tan 9^(@) tan 23^(@) tan 60^(@) tan67^(@) tan 81^(@))/("cosec"^(2)72^(@)+cos^(2)15^(@)-tan^(2)18^(@)+cos^(2)75^(@))? (a) (1)/(2 sqrt(3)) (b) (sqrt(3))/(2) (c) (1)/(sqrt(3)) (d) 2 sqrt(3)

tan 1^@ tan2^@...tan 89^@=

log tan1^(@)+log tan2^(@)+log tan3^(@)+...log tan89^(@)

The value of tan (1^(0))+tan(89^(@)) is