The cosecant is the reciprocal of the sine. The cotangent is the reciprocal of the tangent. The secant is the reciprocal of the cosine. If you have sin x = 3/5, then csc x = 5/3.
The actual fuel used by the IRL is a blend of about 98 percent ethanol and 2 percent denaturant. The exact composition includes a small amount of high-octane racing fuel. The fuel for today's Indy cars has an octane rating of 113, compared with methanol's 107. This means a significant reduction in pre-ignition, or knocking and pinging. In addition, many of the people who handle the fuel, say it smells like tequila.
NASCAR Fuel Facts. If you've ever wondered what kind of fuel NASCAR drivers use, here's your answer! Sunoco provides all NASCARÂ® teams with Sunoco Green E15 â a 98 octane fuel blend specifically engineered for high-performance engines. We call it Green E15 because the fuel is actually green in color.