" (i) "tan20^(@)tan35^(@)tan45^(@)tan55^(@)tan70^(@)=1

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

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

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

Evaluate : 2((cos65^(@))/(sin25^(@)))-(tan20^(@))/(cot70^(@))-sin90^(@)+tan5^(@)tan35^(@)tan60^(@)tan55^(@)tan85^(@)

Evaluate : 2((cos65^(@))/(sin25^(@)))-(tan20^(@))/(cot70^(@))-sin90^(@)+tan5^(@)tan35^(@)tan60^(@)tan55^(@)tan85^(@)

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

Identify the correct statement/s tan20^(@)+tan25^(@)+tan35^(@)=tan20^(@)tan25^(@)tan35^(@)

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

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