(1/sec A -1 ) + (1/sec A +1 ) = 2 cosec A cot
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Step-by-step explanation:
(1/secA-1)+(1/sec A+1)
=secA+1+secA-1/sec^2 A -1,
=2secA/tan^2A
=2 ×1/cos A×cosA/sinA×1/tanA
2 codec A cot A.
.hope this will help
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