Question

the q is in the picture​

Answer 1

Answer:

$\frac{(1 + cos {}^{2} a)}{sin {}^{2} a}$

$\frac{(1 + \cos {}^{2}a) }{1 - cos {}^{2} a}$

$\frac{1 + cos(a)}{1 - \cos(a) }$

Answer 2

Answer:

1+cosA /1-cosA

=(1+cosA)(1+cosA)/(1-cosA)(1+cosA)

=(1+cosA)^2/(1-cos^2A)

=(1+cosA)^2/sin^2A

=(1+cosA/sinA)^2