Posted by Akash on Friday, June 10, 2011 at 1:27am.
The simple dy/dx = e^x(-sinx) + e^xcosx
= e^x(cosx - sinx)
RS = √2(e^x)(cos(x+π/4)
= √2(e^x)(cosxcosπ/4 - sinxsinπ/4)
= √2(e^x)(cosx(1/√2 - sinx(1/√2)
= e^x (cosx - sinx)
= the dy/dx from above
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