Question

prove that cot theta – tan theta= 2 cos² theta –1/ sin theta cos theta = 1– 2 sin² theta/ sin theta cos theta ​

Answer 1

Answer:

$\cos(theta) - \tan(theta) \: = 2 { \cos(theta) }^{2} \: - 1 \div \sin(theta) \: \cos(theta)$