![]() ![]() ![]() Catalogue of the library of the Royal Astronomical Society, etc. is a moderated chat forum that provides interactive calculus help, calculus solutions, college algebra solutions, precalculus solutions and. These functions have the prefix co- in them for a reason: cosine is the sine of the co-angle, cotangent is the tangent of the co-angle, and cosecant is the secant of the co-angle. Quick Access to the Important Facts and Concepts. Then the derivatives of $\cos$, $\cot$, and $\csc$ can be memorised with not much more effort. ![]() Here is a trick I use to remember the derivatives and antiderivatives of trigonometric functions. ![]()
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