Answer:
Let
?
(1)
Using
?.
(2)
We
have
?.
(3)
(1) + (3) 
Since log [sin (
) = log sin
x
?.
(4)
.
(Using (2))
?..
(5)
(4) + (5) 
?..
(6)
Now 
Let 
.
(6) 
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