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Prove the following results:
Let and
⇒ and
where
Now, LHS is reduced to : tan(x+y)
⇒ ..eq(i)
As where
⇒
⇒
Similarly,
where
⇒
and
⇒ and
Putting these values in eq(i)
⇒
⇒
= RHS
Solve:
Solve: