If `a=cos theta + i sin theta`, then find the value of `(1+a)/(1-a)`.

If a = cos theta +theta i sin, "then find the value of" (1+a)/(1-a) .

If a = cos theta +theta i sin, "then find the value of" (1+a)/(1-a) .

If a=cos theta+i sin theta, find the value of (1+a)/(1-a)

If a=cos theta +i sin theta , find the value of frac{1+a}{1-a}

if a=cos theta+i sin theta then find (1+a)(1-a)

If a = cos theta + i sin theta , then (1 + a)/(1 -a)

If (cos theta)/(1- sin theta) + (cos theta)/(1 + sin theta) =4 , then find the value of cos theta . Find theta if 0^(@) lt theta lt 90^(@)

If a=cos theta+i sin theta then (1+a)/(1-a)=