astradling astradling

11-10-2017
Mathematics

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identify the expression that is equivalent to cot x/ csc x -1

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laurenkruppy laurenkruppy

11-10-2017

cotx = cosx/sinx
cscx = 1/sinx

If we plug these into your equation we get:
(cosx/sinx)/(1/sinx) - 1

Dividing by a number is the same as multiplying by its reciprocal so it can be rewritten as:
(cosx/sinx)(sinx) - 1

The two sinx's cancel each other out so we end up with cosx - 1

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