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Step-by-step explanation:
(√1 + sin x) / (√1 - sin x ) × (√1 + sin x) / (√1 + sin x)
=> √(1 + sin x)² / √ (1 - sin² x)
=> √(1 + sin x)² / √ (cos² x)
=> (1 + sin x) / cos x
=> 1/cos x + sin x / cos x
=> sec x + tan x .............option (a)
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