Posted by **Anonymous** on Tuesday, February 21, 2012 at 2:28pm.

#1

(1/sinx)(sin^2x + cos^2x(sinx/cosx) )/(sinx + cosx)

= (sinx + cosx)/(sinx+cosx)

= 1

Reiny helped with this question but I don't how Reiny did it.

Please explain

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