18 A level Mathematics Calculus Differentiating Trig Functions Part 3 Video 8

This video delves into differentiating trigonometric functions from first principles, specifically focusing on the derivative of tan X. We will walk through the process of using the definition of a derivative to find this, recalling the tangent addition formula and applying small angle approximations for tan h. This method allows us to derive the derivative of tan X, which is secant squared X, also known as one over cos squared X. Subscribe to @AxiomTutoringCourses for more A-level mathematics tutorials.