S saud New member Joined Sep 20, 2005 Messages 1 Sep 20, 2005 #1 Question : z1= cos(2x1)+ isin(2x1) z2= cos(2x2)+ isin(2 x2) prove that : (z1-z2)/(z1+z2) = itan(x1-x2)
Question : z1= cos(2x1)+ isin(2x1) z2= cos(2x2)+ isin(2 x2) prove that : (z1-z2)/(z1+z2) = itan(x1-x2)
stapel Super Moderator Staff member Joined Feb 4, 2004 Messages 16,579 Sep 20, 2005 #2 How far have you gotten? You've plugged the given expressions in for z<sub>1</sub> and z<sub>2</sub>, applied some trig identities, and... then what? Thank you. Eliz.
How far have you gotten? You've plugged the given expressions in for z<sub>1</sub> and z<sub>2</sub>, applied some trig identities, and... then what? Thank you. Eliz.
