Prove that tan 70^(@) = "tan " 20^(@) ...

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

A

`tan 20^(@) + tan 50^(@)`

B

`tan 20^(@) + tan 50^(@)`

C

`tan 20^(@) + 2 tan 50^(@)`

D

`2 tan 20^(@) + 2 tan 50^(@)`

Verified by Experts

The correct Answer is:

C

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