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posted by Lois Monday, July 22, 2013 at 8:10pm.

Which expression is equivalent to csc x - sin x?

Why are you switching names ? Please stick with one name.

csc x - sin x = 1/sinx - sinx = (1 - sin^2 x)/sinx = cos^2 x /sinx = (cosx/sinx) /sinx = cotx cscx

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