Cot4 - 1= cosec4 - 2cosec2
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, proved.
Step-by-step explanation:
To prove that, .
L.H.S. =
=
Using the algebraic identity,
=
= ....(1)
Using the trigonometric identity,
= 1
⇒
Equation (1) becomes
=
=
= R.H.S., proved.
Thus, , proved.
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