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OCW Scholar - Single Variable Calculus 23 Online
OpenStudy (anonymous):

Been out of school for 20 years and my trig is a bit rusty, on problem set 1, 1A-6 part b, express sin(x) - cos(x) in form A*sin(x + c) could someone step me through this problem in some detail? Again, I haven't had Calculus in 20 years, so baby steps won't offend me.

OpenStudy (anonymous):

Dug a little deeper and found the step I was missing...

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