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" Prow that teinito = "tan20^(@)+2tan50^...

" Prow that teinito = "tan20^(@)+2tan50^(@)

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tan50^(@)-2tan10^(@)=

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

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

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

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

Prove that tan 70^@ = tan 20^@ + 2 tan 50^@ .

Prove that tan 70^@ = tan 20^@ + 2 tan 50^@ .

Prove that tan 70^@= tan 20^@+2 tan 50^@ .

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

Find the value of tan20^(@)+2tan50^(@)