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tan 20^(@) tan25^(@) tan 65^(@) tan 70^(...

`tan 20^(@) tan25^(@) tan 65^(@) tan 70^(@)` का मान ज्ञात कीजिए |

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tan 20^(@) + tan 25^(@) +tan 20^@ tan25^(@)=

Evaluate tan20^(@)tan25^(@)tan65^(@)tan70^(@) .

Evaluate tan20^(@)tan25^(@)tan65^(@)tan70^(@) .

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

Tan20^(@) + Tan25^(@) + Tan20^(@)Tan25^(@)

tan 70^(@) - tan 20^(@) -2 tan 40^(@)=

tan 70^(@) - tan 20^(@) -2 tan 40^(@)=

tan65 ^ (@) - tan20 ^ (@) - tan65 ^ (@) tan20 ^ (@) =