Want to prove that you're a cosine champion at your next math exam? Texas Instruments thinks it has the answer. It's trotting out a limited edition version of the TI-84 Plus CE graphing calculator that comes in a gold-hued (as TI puts it, "Golden Ratio") metallic shell -- yes, you can show some swagger while you're visualizing functions. There's also a special "Bright White" model (below) if you're not quite so ostentatious. Both calculators should arrive this summer without a price premium (existing models sell for $108 on Amazon), so you won't have to pay extra to bring some flash to your calculus class.