Prove that :--
(Cosec x- sec x) (cot x - tan x) = ( cosec x + sec x) (sec x.cosec x - 2)
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Answer:
cotx+tanx=cscxsecx
Left hand side
cotx+tanx=sinxcosxsinxcosx(cotx+tanx)
=cos2x+sin2xsinxcosx=1sinxcosx=cscxsecx
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