Question

weite the value of cot2theta -1 by sin2theta

Answer 1

$\cot2( \alpha ) - 1 \div \sin2( \alpha ) \\ \cos2( \alpha ) \div \sin2( \alpha ) - 1 \div \sin2( \alpha ) \\ \cos( \alpha ) - 1 \div \sin2( \alpha )$
Hey here is your answer