Recent content by Mohsin Hussain

sorry for bothering, it was a fairly easy one. didnt read the word "purely". Thanks.

1)If a= cosα + i sinα and the equation az2 + az +1 =0 has a pure imaginary root, then tanα=? 2) cosα+isinα=eiα , quadratic formula 3) What i tried to do was,i put a constant real number and tried to solve it and used demoivres theorem, although the answer is getting weirder and weirder.