" (i) "tan10^(@)times tan20^(@)times tan...

" (i) "tan10^(@)times tan20^(@)times tan30^(@)times....times tan70^(@)times tan80^(@)

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Explore conceptually related problems

tan 70^(@) - tan 20^(@)=

tan20^(@)tan40^(@)tan80^(@)

tan20^(@)tan40^(@)tan60^(@)tan80^(@)=?

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

tan10^(@)-tan50^(@)+tan70^(@)

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

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

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