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

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

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

If (2 sin theta )/(1+ cos theta + sin theta )=x, find the value of (1- cos theta + sin theta )/(1+ sin theta )

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

If tan theta = 7/8 then find the value of [(1 + sin theta)(1 - sin theta)]/[(1 + cos theta)(1 - cos theta)]