Trig identitiies Crossword
                     
                     
                     
                     
                     
                     
                     
                     
 
 
Down: 1) 12) sec x3) -tan x5) (tan x- tan y)/(1 + tanx tany)6) cosx cosy + sinx cosy8) -tan x Across: 1) -sin x4) sec x7) csc x9) -sin x
 

 

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