My answer for(i)matches that of the text book. In(ii), however, I have not arrived at the correct result. Can anyone help me out?

Many thanks.When & , & , express in the form .

Q. (i)(ii)Hence, or otherwise show that .

Attempt: (i)1st: If , then

2nd: Similarly,

3rd:

(ii)1st:

2nd: Taking the values from(i),

3rd: Similarly,

4th: Thus, from the 1st step: