tan70^(@)=tan20^(@)+2tan50^(@)

Find the exact value of the expression (tan70^(@)-tan20^(@)-2tan40^(@))/(tan10^(@))

Prove that tan70^(@)=2tan50^(@)+tan20^(@) .

Prove that tan70^(@)=2tan50^(@)+tan20^(@)

The value of (tan70^(@)-tan20^(@))/(tan50^(@))=

2tan10^(@)+tan50^(@)=2x,tan20^(@)+tan50^(@)=2y,2tan50^(@)+tan70^(@)=2w and tan20^(@)+tan70^(@)=2z which of the following is/true

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