Simplify the expression
Cot(x)sin(x)-sin((pi/2) -x) + cos(x)
choices are
cos x
sin x
2 sin x
2 cos x

Question

Simplify the expression
Cot(x)sin(x)-sin((pi/2) -x) + cos(x)
choices are 
cos x
 sin x
 2 sin x
 2 cos x

mandre · Answer

It's a case of finding and applying the right identities. If you don't have a sheet of identities close at hand or easy access to it then I suggest you get that.

anonymous · Answer

@Mandre i do, ive got it down to 2cos(x)-1-sin(x)
but thats not one of my choices and im not sure about where to go from here.

anonymous · Answer

sin(90-x)=cosx.this -cosx will cancel with +cosx.so what you have left is cotxsinx.now cotx=cosx/sinx...sinx will be cancelled and you get cosx

mandre · Answer

I don't care about medals. I just like to help where I can.

anonymous · Answer

good for ya i helped where i could :)

mandre · Answer

I did not give any answers so let's not derail someone's question. Looks like has his answer :)

anonymous · Answer

my bad was the other guy sorry @Mandre