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.
How does a plug-in hybrid work? A hybrid car is like two cars in one: it has a conventional gasoline (petrol) engine for fast freeway driving and an electric motor for more economic, pollution-free travel (or idling). In different designs, the wheels are driven by the engine, the motor, or both together. 1  Gasoline pump is the car's primary source of energy. 2  Conventional fuel tank. 3  Conventional internal combustion engine.  Engine powers wheels through conventional gears and transmission.