Jessica G.

asked • 04/28/15

Prove the identities cos? csc?=cot?

I'm so lost 

1 Expert Answer

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Michael J. answered • 04/28/15

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I assume ? = θ
 
We need to know the basic identities:
 
cscθ = 1 / sinθ
cotθ = cosθ / sinθ
 
 
We want to simplify the left side of the identity so that it equals the right side.
 
cosθ * (1 / sinθ) = cotθ
 
cosθ / sinθ = cotθ
 
cotθ = cotθ
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