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Question

Show that:
cosecA+1CosecA1CosecA1CosecA+1=2tanA.

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Solution

cosecA+1cosecA1cosecA1cosecA+1
=(cosecA+1)2(cosecA1)2cosecA1cosecA+1
=(cosecA+1)(cosecA1)cosec2A1
=2cotA=2tanA.

1202104_1196474_ans_ac7965f840014c10a3fb8cfc05a0ecd3.jpg

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