Answer :

seetha1980

Step-by-step explanation:

LHS= csc^2 θ . tan^2 θ - 1

= (1/Sin^2 θ). (Sin^2 θ / cos^2 θ) - 1

= 1/cos^2 θ - 1

= (1 - cos^2 θ) / cos^2 θ

= sin^2 θ / cos^2 θ

= tan^2 θ

= RHS

Hence proved

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