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Trig Identities

csc2xtan2x-1
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1 Answer

Hi Chloe,
 
csc²xtan²x-1= (1/sin²x)(sin²x/cos²x)-1
 
                  =(1/cos²x)-1
 
                  =sec²x-1
 
                   =tan²x   (1+tan²x=sec²x)