Comprehensive guide to the derivative of tanx using limit definitions and quotient rule. Learn why it's sec²x with step-by-step proofs, real-world applications in physics/engineering, common mistakes, and memorization tips.
Master derivatives of trigonometric functions with clear rules, real-world examples, and common mistakes. Includes cheat sheets for sin, cos, tan, sec, csc, cot derivatives and practical applications in engineering and physics.