" tam "10^(@)" tam IS "tan75^(@)tan80'=?

Show that : (i) tan 10^(@) tan 15^(@) tan 75^(@) tan 80^(@) = 1 (ii) sin 42^(@) sec 48^(@) + cos 42^(@) "cosec 48"^(@) = 2

Show that: tan 10^(@)tan 15^(@) tan 75^(@)tan 80^(@)=1

Choose the correct answer in each of the following questions: tan 10^(@) tan15^(@)tan75^(@)tan80^(@)=?

tan10^(@) tan 20^(@) tan 30^(@) tan 40^(@) tan 50^(@) tan 60^(@) tan 70^(@) tan 80^(@)=

Prove that: tan10^(@) tan20^(@)tan70^(@)tan80^(@)=1

Prove that: tan10^(@) tan20^(@)tan70^(@)tan80^(@)=1

Prove that: (i) tan 50^(@)="tan"40^(@)+2 tan 10^(@) (ii) 2 tan 70^(@)="tan"80^(@)-"tan"10^(@)

The value of tan10^(@)tan15^(@)tan75^(@)tan80^(@) is

The value of tan 10^(@)* tan20^(@)*tan45^(@)*tan70^(@)*tan80^(@) =_________