If ` a = cos theta + isin theta ` , then find the value of `(1 +a)/(1-a)` then z =` - ibar(z)` .

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

If sin theta+cos theta=1, then find the general value of theta.

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 pi lt theta lt 2pi and z=1+costheta+isintheta , then find the value of |z|.