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सिध्द कीजिए कि : tan 70^(@) - tan 20^(@)...

सिध्द कीजिए कि : `tan 70^(@) - tan 20^(@) -2 tan 40^(@) =4 tan 10^(@)`

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Prove that tan 70^(@)-tan 20^(@)-2 tan 40^(@)=4 tan 10^(@)

Prove that tan 70^(@) - tan 20^(@) - 2 tan 40^(@) = 4 tan 10^(@) .

Show that : tan 70^(@)=2 tan 40^(@)+ tan 20^(@)+ 4 tan 10^(@)

Prove that : tan 70^(@) = tan 20^(@) + 2 tan 50^(@)

The value of (tan 70^(@) - tan 20^(@))/tan 50^(@) =

tan 20^(@) + tan40^(@) + sqrt(3).tan 20^(@).tan 40^(@)=

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

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