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" (i) "tan7^(@)*tan23^(@)-tan60^(@)*tan6...

" (i) "tan7^(@)*tan23^(@)-tan60^(@)*tan67^(@)-tan83^(@)=sqrt(3)

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

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

Evaluate :tan7^(0)tan23^(@)tan60^(@)tan67^(0)tan83^(@)

Evaluate : tan7^(@)tan23^(@)tan60^(@)tan67^(@)tan83^(@)+(cot54^(@))/(tan36^(@))+sin20^(@)sec70^(@)-2

Evaluate : tan7^(@)tan23^(@)tan60^(@)tan67^(@)tan83^(@)+(cot54^(@))/(tan36^(@))+sin20^(@)sec70^(@)-2

(tan60^(@)-tan30^(@))/(1+tan60^(@)tan30^(@))=tan30

tan20^(@)-tan80^(@)+sqrt(3)tan20^(@)tan80^(@)=

Prove that tan 7^@ tan23^@ tan60^@tan67^@tan83^@ = sqrt3 .