Trig identitiies Crossword
                     
                     
                     
                     
                     
                     
                     
                     
 
 
Down: 1) csc x2) 13) sec x6) -sin x7) -tan x Across: 2) (tan x- tan y)/(1 + tanx tany)4) sec x5) cosx cosy + sinx cosy7) -tan x8) -sin x
 

 

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