(1+tan A+sec a)(1+cot a-cosec a)=
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Step-by-step explanation:
(1 + SinA/CosA + 1/CosA)(1 + CosA/SinA - 1/SinA)
=> [CosA + SinA + 1 /CosA][SinA+CosA - 1 / SinA]
=> (CosA+SinA + 1)(CosA+SinA - 1] / SinACosA
=> (SinA+CosA)² - 1 / SinACosA
=> 2SinACosA/SinACosA
=> 2
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