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

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

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

tan20^(@)+2tan50^(@)=

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

The value of tan20^(@)+2 tan50^(@)-tan70^(@), is

The value of tan20^(@)+2 tan50^(@)-tan70^(@), is

The value of tan20^(@)+2 tan50^(@)-tan70^(@), is ................. A) 1 B) 0 C) tan 50^(@) D) tan 70^(@)

Prove that: tan10^(@)tan50^(@)+tan50^(@)tan70^(@)+tan70^(@)tan170^(@)=3

The value of tan10^(@)tan50^(@)tan70^(@) is

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