solve the following 12 questions
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LHS - =(tanø/secø-1)+(tanø/secø+1)
=tanøsecø+tanø+tanøsecø-tanø/sec²ø-1
=2tanøsecø/tan²ø
=[2(sinø/cosø)*(1/cosø)]/[(sinø/cosø)*(sinø/cosø)]
=2*(1/sinø)
2 cosecø
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