" (ii) "tan20^(@).tan35^(@).tan45^(@)*tan55^(@).tan70^(@)=1

Value of tan25^(@)tan35^(@)tan45^(@)tan55^(@)tan65^(@) is

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

(2sin68^(@))/(cos22^(@))-(2cot15^(@))/(5tan75^(@))-(3tan45^(@).tan20^(@).tan40^(@).tan50^(@).tan70^(@))/(5) is equal to

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

tan 10^(@)*tan20^(@)*tan30^(@)*tan40^(@)*tan50^(@)*tan60^@tan70^(@)*tan80^(@)=

Prove that: tan10^(@)tan50^(@)+tan50^(@)tan70^(@)+tan70^(@)tan170^(@)=3

Evaluate tan20^(@)tan25^(@)tan65^(@)tan70^(@) .

Evaluate tan20^(@)tan25^(@)tan65^(@)tan70^(@) .

Prove that: tan20^@tan35^@tan45^@tan55^@tan70^@=1

Evaluate : ( 1 ) cosec (65° +theta) -sec (25° - theta) - tan (55° + theta) + cot (35° - theta) (2) (3cos55^(@))/(7sin35^(@))-(4(cos70^(@)cosec20^(@)))/(7(tan5^(@)tan25^(@)tan45^(@)tan65^(@)tan85^(@)))