Question

sinA/1-cosA=cot
A/2​

Answer 1

check out the answer here

Answer 2

Step-by-step explanation:

SinA = sinA/2 = 2sinA/2cosA/2

& 1-cosA = 1- cos2A/2 = 1- (cos^2A/2 - sin^2A/2 )

= 1-(1- sin^2A/2 -sin^2A/2) = 2sin^2A/2

From question : sinA/(1-cosA)

= (2sinA/2cosA/2) /2sin^2A/2

=( cosA/2) /SinA/2

=cotA/2