Question

if neither (a-pi/12)nor (a-5 pi/12) is a integral multiple of pi prove that cot(pi/12-a)+tan (pi/12+a)= 4cos2A/1-2sin2A

Answer 1

Answer:

if neither (a-pi/12)nor (a-5 pi/12) is a integral multiple of pi prove that cot(pi/12-a)+tan (pi/12+a)= 4cos2A/1-2sin2A