Appologies, it's supposed to be the theta sign; I wasn't careful enough when posting the thing. Thanks for the explanation about graphing. Cheers! Ned ----- Original Message ----- From: Nelson Blachman To: maths@xxxxxxxxxxxxx Sent: Thursday, December 07, 2006 10:05 PM Subject: [maths] Re: integrals; calculus Ned, You have the right integral for g(0) provided that the symbol 0 is not the number zero but is the letter O. If it's really the number 0, there's no variable with respect to which to integrate, and the problem is meaningless. The integral of a function represents the area under the graph of the function or the distance traveled if you're integrating speed as a function of time or the amount of water in a bucket if you're integrating the rate of flow of the water into the bucket, which may bary as you adjust the tap. HTH, Nelson ----- Original Message ----- From: Ned Granic To: maths@xxxxxxxxxxxxx Sent: Thursday, December 07, 2006 9:30 AM Subject: [maths] integrals; calculus Here is one more so-so obvious problem: Find the most general integral of g(0) = cos 0 - 5sin 0. Is it: G(0) = sin 0 + 5cos 0 + C? And, how do I sketch, or start sketching rough graphs of integrals of functions? How do I know what they roughly should look like? Many thanks in advance! Ned