Show that cosec(270-A)+cosec(90-A)+sec(90-A)+sec(270-A)=0
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Cosec(270-A) = -secA
Cosec (90-A) = SecA
Sec (90-A) = cosecA
Sec (270-A) = -cosecA
Cosec(270-A) +Cosec (90-A) +Sec (90-A) + Sec (270-A)
= -secA+SecA+cosecA-cosecA
= 0
Hence proved
Cosec (90-A) = SecA
Sec (90-A) = cosecA
Sec (270-A) = -cosecA
Cosec(270-A) +Cosec (90-A) +Sec (90-A) + Sec (270-A)
= -secA+SecA+cosecA-cosecA
= 0
Hence proved
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