1.

If 2a=2tan10∘+tan50∘ 2b=tan20∘+tan50∘ 2c=2tan10∘+tan70∘ 2d=tan20∘+tan70∘, then which of the following is/are correct ?

Answer»

If 2a=2tan10∘+tan50∘
2b=tan20∘+tan50∘
2c=2tan10∘+tan70∘
2d=tan20∘+tan70∘,
then which of the following is/are correct ?



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