This is just a few minutes of a complete course. Get full lessons & more subjects at: http://www.MathTutorDVD.com. Basic trig identities are the core trig identities that involve sine, cosine, tangent, cotangent, secant, and cosecant. We discuss each of these important trigonometric functions and gain practice solving problems. We will first discuss the sin (sine) function, the cos (cosine) function and the tan (tangent) function. Next, we will review an easy way to remember the trig identities that involve these trig functions. We will solve several problems that involve these basic identities to give practice.