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seen May 25 at 17:04

Oct
30
comment Is this conjecture about integration of sinusoids on a specific interval correct?
I'm not sure why the integral of $sin(k(x+j))$ is $\frac{-1}{k}cos(k(x+j))$. Where is the 1/k coming from?
Oct
30
accepted Is this conjecture about integration of sinusoids on a specific interval correct?
Oct
30
revised Is this conjecture about integration of sinusoids on a specific interval correct?
removed redundancy
Oct
29
comment Is this conjecture about integration of sinusoids on a specific interval correct?
Why isn't the j relevant? If it was shifted left or right, wouldn't that change where the halves line up?
Oct
29
asked Is this conjecture about integration of sinusoids on a specific interval correct?
Oct
7
awarded  Scholar
Oct
7
awarded  Supporter
Oct
7
comment Homework Help: revolutions and trigonometry
+1 for an great diagram and clarity in answer
Oct
7
accepted Homework Help: revolutions and trigonometry
Oct
7
awarded  Student
Oct
6
comment Homework Help: revolutions and trigonometry
Well, I tried a couple things with the assumption the distance around the circle I was looking for was 45 ft, but that's obviously wrong. I tried (sorry for no LaTeX): 50pi ft/40 sec = (45/50pi ft)/x sec and other ratio things. I tried a number of sin-inverses: 45/50pi, 20/50pi (because r=25, 45-25=20)
Oct
6
asked Homework Help: revolutions and trigonometry
Sep
9
answered Work and Time calculation
Jun
21
awarded  Editor
Jun
21
revised What is the usefulness of matrices?
I never added a note on matrix use in calculators
Jun
19
awarded  Teacher
Jun
19
answered What is the usefulness of matrices?