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" **ii) Prove that "tan70^(@)-tan20^(@)=...

" **ii) Prove that "tan70^(@)-tan20^(@)=2tan50^(@)" (May "

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

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

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

Prove that tan 50^(@) -tan40^(@)-2tan10^(@) .

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

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

Prove that tan40^(@) + 2tan10^(@) = tan50^(@)

Prove that tan 70^@=tan 20^@+2tan50^@

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