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Mathematics 8 Online
OpenStudy (anonymous):

tanx (csc^2x -1) / senx + cosx cotx = cosx how can I prove this?

OpenStudy (kainui):

Is sen supposed to be sec or sin?

OpenStudy (anonymous):

sin

OpenStudy (kainui):

|dw:1320628264547:dw| Is that your formula?

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