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

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

If alpha=cos theta+i sin theta, then (1+alpha)/(1-alpha) equals ( (i)cot theta(ii)i tan((theta)/(2))(iii)i cot((theta)/(2))(iv)cot((theta)/(2))

if a=cos theta+i sin theta, prove that (1+a)/(1-a)=cot((theta)/(2))i

1 + cos theta + i sin theta | =?

(1)/(cos theta-i sin theta)

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

If x= cos theta+i sin theta and 1+ sqrt(1-a^(2))=na , show that, (a)/(2n)(1+nx) (1+(n)/(x))=1+ a cos theta

Solve (1)/(cos theta-i sin theta)

If z_1 = cos theta + i sin theta and 1,z_1,(z_1)^2,(z_1)^3,.....,(z_1)^(n-1) are vertices of a regular polygon such that (Im(z_1)^2)/(Re Z_1) = (sqrt5-1)/2 , then the value n is