qs 41 plzz Q 41 1-cos A1+cos A=sin A1+cos A - Maths - Trigonometry

Question

qs 41 plzz
Q 41 1 - cos   A 1 + cos   A = sin   A 1 + cos
  A

Sambit Mallick · Answer

LHS: sq root of (1-cos A)/(1+cos A)
=sq root of (1-cos A)(1+cos A)/(1+cos A)(1+cos A)
=sq root of (1-cos2A)/(1+cos A)2
=sq root of sin2A/(1+cos A)2
=sin A/(1+cos A) (RHS)
Hence LHS=RHS Proved

qs 41 plzz Q.41. 1 - cos A 1 + cos A = sin A 1 + cos A

qs 41 plzz
Q.41. $\sqrt{\frac{1 - \cos A}{1 + \cos A}} = \frac{\sin A}{1 + \cos A}$