In this lesson, you will learn how to take the derivative of trig functions in calculus. The derivative is the slope of the line tangent to the curve. What we will find is that the derivative of the sine function is equal to the cosine function. This is because sin and cos are related functions and only differ by a phase shift. We will also learn the derivatives of other functions such as tangent, cotangent, secant, and cosecant. More Lessons: http://www.MathAndScience.com Twitter: https://twitter.com/JasonGibsonMath