all trignometric udentities with reciorocal and otherso
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sin²∅+Cos²∅=sec²-tan²∅=cosec²∅-cot²∅ = 1
sin∅=1/cosec∅
cos∅=1/sec∅
tan∅=1/cot∅
sin∅=1/cosec∅
cos∅=1/sec∅
tan∅=1/cot∅
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