Verify the identity.   cotangent x equals StartFraction sine 2 x Over 1 minus cosine 2 x EndFractioncot x=sin2x1−cos2x       Question content area bottom Part 1 Use the appropriate​ double-angle formulas to rewrite the numerator and denominator of the expression on the right. For the denominatordenominator​, use the​ double-angle formula that will produce only one term in the denominatordenominator when it is simplified.   Part 2 StartFraction sine 2 x Over 1 minus cosine 2 x EndFractionsin2x1−cos2x equals= StartFraction nothing Over 1 minus left parenthesis nothing right parenthesis EndFractionenter your response here1−enter your response here     equals= StartFraction nothing Over nothing EndFractionenter your response hereenter your response here Simplify the denominatordenominator. Enter the numeratornumerator found in the previous step. Part 3 The expression from the previous step then simplifies to cotangent xcot x using​ what?     A. Reciprocal Identity   B. ​Even-Odd Identity   C. Pythagorean Identity   D. Quotient Identity