Q. 2 I5.0( 1 Vote )

Simplify

cot12° cot38° cot52° cot60° cot78°.

Answer :


cot 12° cot 38° tan (90–52)° tan (90–78)°

cot 12° cot 38° tan (38)° tan (12)°


cot 12° × 1 × tan (12)°


1


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