Im trying to verify the identity cos (X-pi/2)= sin x
Can someone please break down? Literally step by step. And indicate which identities r being used.
Follow Math Help Forum on Facebook and Google+
Yes, i figured as much using the sum and difference identity. Dont know what to do afterr that.
Well, cos(pi/2)=0 and sin(pi/2)=1 so you end up with sin(x)=sin(x).
Ohhhhhh....drat...didnt realize had to look at them individually, i was too bz just figuring out how to cancel each other out to get sin x alone. Thanks so much!
Click here for a proof of cos (a-b)=cos(a)cos(b)-sin(a)sin(b)
View Tag Cloud