Trigonometry/Derivative of Cosine

From Wikibooks, open books for an open world
Jump to: navigation, search

To find the derivative of Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "/mathoid/local/v1/":): \cos(x) .


As in the proof of Derivative of Sine, the limit of the first term is and the limit of the second term is 1. Thus



and so on for ever.