SOLUTION: how do you prove that sinxCosx=cosx-cos^3x/sinx are egual? also 2+2Cot^2= 2cotx secx cscx?

SOLUTION: how do you prove that sinxCosx=cosx-cos^3x/sinx are egual? also 2+2Cot^2= 2cotx secx cscx?

Algebra.Com

Question 370078: how do you prove that sinxCosx=cosx-cos^3x/sinx are egual?
also 2+2Cot^2= 2cotx secx cscx?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Let , to reduce some of the clutter,
.
.

Now just go backwards.
.
.
.

Again work backwards.
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