(1+tan^2A)cotA/cosec^2A=tanA
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(sec^2A ) cot A / cosec^2A
(1/cos^2A)×(cos A / sin A)× 1/cosec^2A
( cot can be written as cos/sin)
( 1/cosec ^2A can be written as sin^2A)
(1/cos^2A)×(cos A / sin A)×sin^2A
After reducing
Sin A / cos A
= tan A
(1/cos^2A)×(cos A / sin A)× 1/cosec^2A
( cot can be written as cos/sin)
( 1/cosec ^2A can be written as sin^2A)
(1/cos^2A)×(cos A / sin A)×sin^2A
After reducing
Sin A / cos A
= tan A
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