Asked by Anonymous
How can cos(x - pi/4) be rewritten as sin(x + pi/4)?
Answers
Answered by
oobleck
How? Because it's the same.
Recall that
sin(u) = cos(pi/2 - u)
So just plug in u = x + pi/4
Recall that
sin(u) = cos(pi/2 - u)
So just plug in u = x + pi/4
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