This my question from Rd dharma. Can you please solve this question

solving here step wise,

tanA (1- secA) – tanA (1+secA) / 1- sec^2A

= -2tanAsecA / 1- (1 + tan^2A)

= -2tanAsecA / -tan^2A

= 2secA / tanA

= secA * cotA = 2/ cosA * cosA / sinA = 2/ sinA = 2cosecA

Hence proved.

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