Evaluate the following using suitable identities:
(i)
(ii)
(iii)
Solution (i)
We know that
(1)
In this problem, we have
and
, putting these values in (1), we get
Solution (ii)
We know that
(1)
In this problem, we have
and
, putting these values in (1), we get
Solution (iii)
We know that
(1)
In this problem, we have
and
, putting these values in (1), we get
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