DrStrangeLove
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 Mar 24 awarded Notable Question Mar 16 awarded Popular Question Oct 9 awarded Popular Question May 15 awarded Popular Question Jan 13 awarded Popular Question Sep 23 awarded Popular Question Aug 31 awarded Nice Question Jul 2 awarded Curious Mar 14 awarded Popular Question May 13 awarded Caucus Apr 17 asked Matrix norm applications? Mar 12 asked What are the differences between Hilbert's axioms and Euclid's axioms? Mar 6 asked Is this recurrence relation correct? Jun 25 awarded Yearling Jun 8 awarded Caucus May 26 comment How do I simplify this trig expression? @JoeL. is it possible to use (cos(2x)+cos(3x))⋅cosx ?? i calculated and found (for example,in degrees) cos(15)+cos(30) != cos(45) :( May 26 asked How do I simplify this trig expression? May 25 comment How to factor the quadratic polynomial $2x^2-5xy-y^2$? @TonyK i tried, but it didnt work.. :( May 25 asked How to factor the quadratic polynomial $2x^2-5xy-y^2$? May 19 accepted Simplifying trigonometric expression