What is the value of `tan18^(@)` ?

What is the value of tan 105^(@) ?

What is the value of tan315^(@) ?

What is the value of tan 45^(@)

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

What is the value of tan 150^(@)?

What is the value of tan 30^(@) ?

What is the value of tan 15^(@).tan195^(@) ?

What is the value of tan(405^(@))

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)

What is the value of Tan 15^@ ?