Question

whoever answered how to simplify tan 70 degrees + cot 20 degrees minus 2 tan 70 degrees by saying 0 I need you to provide me with a full explaination.

Answer 1

Answer:

I'm not the same guy but here I go.

Step-by-step explanation:

tan70 + cot20 - 2tan70

= tan70 + tan(90-20) - 2tan70  [since cot(90 - A) = tanA]

= tan70 + tan70 - 2tan70

= 2tan70 - 2tan70

= 0

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